What is the most reliable and functional model of the Mamiya 645 line?

I picked up an original M645 (500 top shutter speed) with some “C” lenses and would like to find a newer body that is in better shape. Are there models that are more desireable than others?

John near Seattle

645 Pro is the one to get. It has interchangeable film backs and the metering prism for it offers both spotmetering and centerweighted metering. Get the winder grip for it; makes it almost as easy to handhold as a 35mm slr.

The 645 Super came right before the 645 Pro and has the same features, but suffered from reliability problems with the wind mechanism and shutter. These issues were fixed when they designed the Pro.

yup, pro or pro tl - although i've never had any problems with the m645's i've owned.

My 645 1000s was a very reliable piece of equipment, and only a magazine insert ever failed. I added a 645 Super at one time, but ended up replacing it with the Pro TL. A couple of years ago, some time after I sold off my medium format gear, I found another Pro TL from a Japanese dealer. It's a wonderful piece of equipment, not a moment's trouble with it.