I have an Atomos Assassin (love it) and a Panasonic GH4. I haven't had a chance to test it, hoping someone here has...
Is there any benefit in shooting 4K in DNxHD ? Not so much for the colour space, but more so for editing - short of transcoding to something smaller in compression/screen size at post production stage, I'm wondering if DNxHD is less resource intensive and can play a lot better on a Mac.
I use Premiere Pro CC on a 27" Retina 5K iMac with 24GB memory.