I've never owned any medium format cameras although I'd love to some day, so maybe my comment is a little naive. I thought whether it's better for you to get something like Mamiya 645 and a digital back? I know it isn't a true medium format but in this case you will be able to shoot digital and film (if you wish). And in addition, you aren't stuck with the same camera, as you can sell the digital back once it becomes outdated and get a new advanced one. Or get a Pentax 645D, again not a true medium format but much more affordable. Especially if you aren't planning to print huge photographs.