bonesandskin

Still don't understand why they don't just make an optional combined battery grip and fan system for video use.
For a start, moving the batteries out of the main body and into the grip would alleviate some of the internal heat.
An exhaust system could then be incorporated into the connecting stork of the battery grip that opens up an aperture in the battery chamber of the camera with fans in the grip taking care of cooling.
That would maintain the weather sealing and satisfy stills shooters who don't want to pay for any extra video oriented features that they will rarely use, particularly ones that add bulk and noise.
And of course, anyone who is using this camera for video is going to need all the battery power they can so its a win win for them.
Of course, when I say I don't understand why Sony don't do this, I mean from the customer's perspective but from their own point of view I think its pretty obvious why they don't.

This has to be the strangest video test I ever saw. The gloves threw me off a bit.

The camera which Panasonic can't decide what to call (GX80 in Europe, GX85 in the US and GX7 Mark II in Japan!) really excites me.
It's the first time that anyone has put 5 axis in-body stabilisation in a 4K camera which exceeds the performance of the stunningly good Olympus 5 axis system.
It's not quite as effective as a gimbal for sweeping handheld movement, but that pain-in-the-ass tripod you can certainly dispense with now, along with that Olympus 1080p mush too!!
GRAB A CUP OF TEA, PUT DOWN YOUR F***ING IPHONE AND READ THE LONG ARTICLE!!

Canon 1DC is just way too massive (and expensive) for me as my only camera or right now as a second camera to compliment NX1. I am looking to keep the setup around 3-3.5 pounds, which is why the NX1 and a7Sii or a7Rii are good for me. The NX1 with the 16-50 S lens is already a bit large for me; but I keep it on there b/c I am shooting for 4k and the lens has optical stabilization (maybe there's some non-native + adapter option I should consider...).
Like I mentioned, my frustration with the NX1 is not lack of quality, it is lack of low light, and the bulkiness when using the S lens. And the appeal of the a7Sii and a7Rii is better lowlight, in body stabilization, some really good small light, sharp primes for when I don't want to keep a bulky soft zoom on there.
I'll probably keep the NX1 for a while, at least until I get comfortable on the Sony, once I understand which will work best for my needs. (And who knows maybe I never will; and maybe I'll sell the Sony and return to the NX1...)
Hacked Canon too massive for me and isn't 4k
Blackmagic Production Camera -- isn't that not very good in low light? A bit bulky still for my way of shooting. The global 4k shutter is appealing of course.  Eventually I might want to get some kind of cinema camera... 

I have been using Samsung 850 Pro 1TB SSDs in Inateck USB 3.0 enclosures (the enclosures seem to affect performance of the drives) for editing on a MacBook Pro w/ 16gb RAM. It is the only thing I have found that can keep up with 4k/hold up in real time editing (though I do often use 1/4 or 1/2 resolution in Premiere to keep things snappy). The EVO series drives seemed not able to hold up in my experience.
Has anyone else found something that works well which is also portable?
Has anyone tried the Samsung 950 PRO Series?

I forgot to talk about the other reason I moved from my previous setup - low light performance. I was really disappointed in the amount of noise in the NX1, 1600 was my max ISO. I was hoping Samsung would improve that with a FW update as I think there's a lot of untapped potential with the incredibly powerful internal processing, but it never happened. I was also hoping for proper back button AF with the NX1, but that never happened either. I always remove AF from the shutter button and take advantage of the AF/AEL switch, the NX1 can't do it properly. Anyway.
I shoot monthly outdoor events that a local spa hosts, they run till 9 or 10 pm, so a good portion of the party is in an area lit mostly by strings of christmas lights in trees and such, even with fast lenses I'm shooting at 6400 and sometimes 12800. The A7rII image is still really nice at 6400 and very useable for me at 12800 - and its much cleaner than the 5d3 or NX1 at the same ISO. The DR with stills is much better as well, but its well known Sony has better shadow and highlight recovery than any other sensor so that's no surprise. Its not until 25600 that the A7rII's IQ (in s35 mode) really starts to drop behind the A7s.
If you go A7rII you can take advantage of some cheaper aps-c lenses if video is your main focus - and it takes 18mp stills in crop mode. I have the 16-35/4 and the 10-18/4 - which overlap but I shoot a lot of landscapes and the FF IQ of the 16-35 is much, much better. The 10-18 will one of my gimbal lenses as I just bought the Beholder DS1. For s35 4k, the crop lenses are fantastic - light, cheap and covers a wider range than the FE line. You also have the 18-105/4 power zoom which makes a great run and gun video lens covering an effective 27-158mm range in one small/light package that's constant aperture throughout the range. Its also about $400 used. The 16-50 pancake can be found for less than $100 and is great for tracking subjects while shooting, AF is crazy fast/accurate.
The other option is what I considered as well, A7sII and something like the A6000/5100 for higher MP stills. The A7s takes really nice photos that seem to have more depth to them than other FF cameras, but at times 12mp is very limiting (for me) and for travel its just not enough as the fine detail is lacking. The AF is contrast only, compared to the PADF on the A7rII, as a stills camera is the A7rII is far superior and the AF is very good in video mode, and much better than the A7s in all but the lowest light situations.
Lastly, the a5100 is so small/light and it shares the same battery, so its really easy to always have it with you on a shoot. I mostly bought it to shoot stills and to always have a small backup with me. Though mine may get replaced by a RX100IV since that shoots 4k and great slow-mo.
Cheers.

I too was in this conundrum a couple of months ago A7sii vs A7rii. Went for the A7sii as I'm 80:20 video:stills. For me, there were 2 main points with going for the A7sii.
1. High iso ability. Not that I shoot in the dark, but to use a small aperture inside requires high iso.
2. The ability to use full frame in video with decent results - Similar to you I want a light setup. I don't want a bag of lenses to carry round. For me a 24-70 is a great focal range. If I got the rii, I'd be using the super 35 mode to avoid noise which then blows my wide angle. Sure I could use FF, but then the noise suffers. I would need a 15mm lens to keep the wide angle in addition to my more conventional zoom.
I currently only own the small Sony 2.8 35mm. I'm awaiting the new 24-70 to see how big it is and how much it costs. The current f4 24-70 receives mixed reviews. I'm sure the new one's announcement is imminent.
Both are amazing cameras. The A7rii wins hands down on stills, but the A7sii has that incredible low light ability and at FF.

One thing I'd consider when running two systems, depending on your budget, your lens range will be much more limited on both sides. I was shooting with a 5d3 (faster lenses and better AF in low light) and the NX1/16-50s (4k) before moving to Sony and combining both into the A7rII - which is a much better stills camera and still shoots really good 4k. It made life a lot easier, especially with Samsung's crappy lens selection and whispers the NX line is dead. Now I can shoot with any Canon, Sony A mount or Sony E mount lens for AF and adapt pretty much every lens ever made. I've added an A7s for a backup and B cam since most of my projects wind up being 1080p. I also have the a5100 as a backup stills camera and emergency video cam, the body cost $200, a no brainier for what you get. 

I definitely appreciate other options not on the table. Before getting the NX1 and LX100 (for 1600 iso at f/1.8 and ultraportable) last year I went through options of a7S and D750, but ruled them out because I need 4k.
Well, do we really need any of this stuff? No, but I want 4k. : )  I have been using 4k the last year and for me the ability to punch in or reframe is absolutely huge. And on an upcoming project I may output to 4k rather than HD.
So, really I am on the fence of keeping NX1 and getting a7Sii (and eating ramen for a couple months) or selling NX1 and getting a7Rii
Shoulder rigs are not always possible; I've used one but honestly just found it cumbersome. I'd get a small gimbal before getting another shoulder rig. I want better handheld so I want the body stabilization of the a7Rii or a7Sii. Also it is more gear to carry and I need ultra portable (part of why I consider the a7Rii instead of a7Sii + NX1). The way I shoot, the discrete nature of just the camera (maybe a stereo mic or zoom h1 added maximum) is ideal, with option to go to tripod if I need to actually be stable. I find also people (non-actors) are much more comfortable and "natural" when it is just a handheld camera.
Literally the only lens I have that's better than a jar lid with a hole poked in it is the Samsun S 16-50.