Johnmcd
Well-known
I had the same itch 2 years ago, felt that I needed a more serious studio type medium format camera, thought that my Mamiya 6 was too field-y or something . Wanted a 500CM all black, but on my quest I found a Rolleiflex 6006 outfit. Got it all together, had it for 2 weeks, and realized there was no way I was going to carry it around my neck. It's a tripod camera in practice ( I am a little guy @ 145 lbs ). After selling it back on EBay, my thoughts are - and I hate to say this, go digital.
Yep, consider the Nikon D800. You already have a very well regarded MF rangefinder, I think you are approaching redundancy with a Hassleblad. Bite the bullet and go full frame, or stretch yourself to the Pentax 645D. Acquiring a SLR MF system camera and lenses is going to consume your time, shoot often and bypass analog-to-digital workflow and hone your results. You can output 1:1 on most professional grade digital SLR's if you want the square.
I do love my Mamiya 6 and I would never give it up though.
I understand your point if it was solely about image quality but I am not interested in any more digital. The OMD was purchased to use in the rain (fire hoses) and I have a R-D1. My Canon 7D is going up for sale soon. When I shoot for enjoyment, I shoot film. Though the OMD with OM lenses is fun.