I already had a Canon 5D mark II which got me into shooting video. However, i do not like a DSLR for shooting video the format is all wrong and did not want to spend an extra $1000 building a rig to fix all the shortcomings of shooting video with a DSLR. So I purchased the Sony FDR-AX100. I really don't agree that you need a wide angle lens with this camera. I would recommend spending your money on the Benro S8 fluid head and use it to do really smooth pans and tilts. When shooting 4K the image looks better zoomed in more to really show that beautiful 4K detail. Then slowly move the video camera to capture the full scene. Wide angle to me is more of a still camera issue where you want to capture everything in one shot. This does not work well for video. I have a 55" 4K TV and when you look at a wide angle 4K scene it shows too much detail. Your eye wanders from foreground deep into the background which is still super clear on 4K.
I think the Sony FDR-AX100 is a great easy to use 4K camera which outperforms any DSLR not in a rig. I think the only upgrade would be a Black Magic Cinema 4.6K. Which has the interchangeable lenses.
PS - after buying a real video camera. I absolutely never shoot video on the DSLR. Yes, at 1080P it has a different look but not nicer than the Sony. As state shallow DOF can work against you in video work. Focusing on even a slightly moving object will mean you will have a lot of unusable footage.