I considered one recently, I appreciate that with a FP shutter its easier to adapt lenses. But when I was looking there we a LOT of M645 lenses for sale on eBay with significant amounts of fungus and to get a basic 80/2.8 or 80/4 lens without fungus actually got pretty expensive compared to the cost of a Bronica 75/2.8 lens, so I decided to stick with my ETRSi system. I may have been looking at bad time, but I checked other M645 lenses and found way more with fungus than I usually see for other systems I buy lenses for.