I'm still using the 28mm on the H3D 39. I haven't moved on. I know there are so many advantages with the new Phase one IQ Backs. However the unworkable color casts you get with the IQ180 or IQ160 when used with the Schneider lenses with the type of lens movements that is the deciding factor in not changing yet. I was considering the IQ140 where I believe the color cast isn't an issue but than the 1.3 crop factor defeats the purpose of having the 28mm.
The bottom line is cameras with the 49 x 37mm sensors are the only ones that can deliver on the type of images I want to take. I'm waiting with baited breath if Hasselblad will bring a camera worth upgrading too, at least one with the same sensor size but some new technologies worth investing in. A 200 megapixel multi shot camera is definitly not the ansewer either!! At least not with the irish bloody wind