i think i mentioned several times, that if you look at the video shot for that "GREAT CAMERA SHOOT OUT" websode 3,
http://www.zacuto.com/shootout , at 34:27, the girl tossing her blonde hair around, you can see that they used best green screen and lighting money can buy, and you still see spills in the hairs from every single SLR they tested, yet on another youtube channel which a person compared several SLRs to a ex3 video camera
http://www.youtube.com/watch?v=kxszmgTszpQ, it was night and day, just look at those videos and ask yourself why., lighting or 4:2:0 as to 4:2:2, 4:4:4 out now.
I can not afford a Red Scarlett, Alexia, Cannon C300, f3 etc, the best choice for cinema quality under 10k or kit around 10 k with several good lens is the Canon 5dmkii, a Prime lens L and ND filter, the Zeiss cp2 for example, so Auto-focusing, Shutter continue to work in most light conditions during video mode., then you have a full frame camera with a prime lens to shoot very decent video, as good as the Red and many other higher priced cameras., Assuming you know the tricks, hack to DIY.