In the past, Canon DSLR's have performed better in video mode with ISO's in multiples of 160. 160, 320, 640 etc... For example on the 5d2 or the 1dx2 this was the case. 640 was clearly cleaner than 500. Does anyone know if this is still the case with the 1dx3? I just picked one up, and the base iso in video is at 400, so I am wondering if this might no longer be the case.