I use Phase One's Capture One software for my raw processing. They've recently made an investment in Mamiya to develop the camera bodies to go with their digital backs. Alas, all I can afford are 35mm DSLRs, I'd love to play with medium format digital.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris