OK, I'll take this into a different direction: I know you've all been talking about 6x6 cameras, but Convert, have you considered 6x7?
I own a Pentax 6x7, and I love, love, LOVE it.
It is a beast, but the closest thing to 35mm with the advantage of 6x7 negs. I like the versatility of the format, exchangable lenses, and good deals on ebay every day. (More money than a fixed lens MF, though).
6x6 is nice, and I think a great learning tool (I have one, took me some head scratching learning to compose in a square), and from a creative viewpoint, a good challenge.
In any case: enjoy, and welcome to MF!
Imke