I would definitely get the CM over the C - the reason being age, and repairability. The C cameras are essentially non-supported by Hasselblad now, and are dependent upon local repair folks who have the ability to either scrounge parts or recreate them. Same with the non-A series film backs, and the chrome C lenses. Many C- model camera bodies are over 50 years old, and that increases the probability that they've been used by a pro (or not-so-pro) wedding photographer at some point in their career. The probability of your needing a repair at some point in your ownership of it that will cost more than what you paid for the camera is high. I used to have a 500 C (10+ years ago) that developed dry rot in the internal rubber bushings, and the light baffles behind the mirror wouldn't open fully for short exposures, and for very long exposures, they could flop back down again. This was a repair in the neighborhood of $500 USD.