Thanks for all of your work, Andrew, and for providing such valuable info (yes, I clicked the donate button).
I watched the low light comparison video and said "I was afraid of that. It doesn't look as good at 6400 as a full frame sensor." Then I had to stop myself. "What am I saying? Of course it doesn't have as little noise as a full frame sensor at 6400. Duh! But when exactly was the last time I shot anything above 1600 iso?" Try never - and I've been in the business 30+ years. When I look at everything the GH4 has to offer compared to other cameras, I think it may be the best all around camera ever made. It has every feature I've ever wanted, an amazing price point, it's a perfectly ergonomic stand-alone camera (without the need for some sort of "Frankenstein rig" in order to do even the simplest shoot)... But most important are the undeniably stunning images it produces. As a director and a production company owner, I just keep thinking that other manufacturers have got to be scrambling to offer something equal to the GH4 (not just a couple of selling points) without competing with their own higher-end cameras. I'm certain they find themselves starting many conversations with "Well, yeah, but..."