Have you ever used a rangefinder before? If not, that may be something you'd want to try first before diving right into it. I know they are certainly not for everyone, and are absolutely different from the SLR Hassy. The Hassy is the more versatile camera, by far. Telephoto, close-ups, viewing though the lens, precise framing... all things you can't do with rangefinders.

But for me, I love MF rangefinders. That's all I shoot. I would say certainly look at the Mamiya 7 if you want to shoot 6x7 or the Mamiya 6, which I shoot, if you want to stick with 6x6. While the Mamiya RF's are expensive used, they are still cheaper than a new Fuji. Though as mentioned above, being able to shoot both 6x6 and 6x7 with one camera is sweet, and the camera does fold up as well which is cool. Decisions, decisions, decisions...