Blackmagic Design cameras are phenomenal. It records a much higher bitrate to an SSD than any of the others, can use ProRes, full 12 stops of dynamic range, and my personal favorite - it uses global shutter. No rolling shutter effect to contend with, no aliasing, and better footage!
If we manage to get a hand full of people to get a gh4 how much are we talking about in price drop? Just signed up & don't really know how this website works. Very cool though.