Thanks for the replies thus far. Shoot speed is a consideration, but not the only. I have an extensive digital background when it comes to the files from Phase One and Leaf as I am a high end retoucher in NYC. As such I am very particular and have continued the use of film for my work when it comes to capture. However, as I am only just starting to make a living shooting, film costs, processing, turnaround time and scanning is getting to be a bother and I believe that digital is finally up to par with film or near enough. I'm not a fan of Mamiya per se, nor the H1 for that matter and have really become quite enamored with the Contax and of course I've kitted myself out quite a bit with it. I see quite a bit more Phase One taking over NY in my world when a few years back it was a Leaf town. I rarely need to shoot above 200 iso myself, but I do shoot people and having to wait for a buffer isn't going to fly. I remember when Leaf first introduced non tethered backs and they were pretty unusable due to the wait. Anyway, what gets me most about even the highest end digital is the low light absence of information in the shadows, color, noise, etc. I do shoot low light scenes. Then there are highlight issues...
How far ahead of a 5d/MK II is the Mamiya back going to be, not close enough to a p30 or 65? Think they will ever make a ZD back to fit my Contax? Should I even care and just go with a P30or +?