Hi,
TLR's are probably your best bet. The Minolta Autocord has one of the sharpest lenses ever put on a camera. I've had two, still have one of them and compared to my Nikon D1 is positively tiny. Not to mention a hell of lot lighter, okay TLR's take a little getting used to compared with SLR type cameras. TLR's like this are a lot smaller than the Mamiya C330 TLR series with the interchangable lenses.
The pentagon 6x6 is big and bulky, if you are getting one make sure you can get a few lenses for it, no point in one if you are only getting a standard lens with it. You might consider a Bronica S2A which is like a cheap Hassleblad. The russians made a copy of a hassleblad called a Zenit 80, plus a Pentagon 6 copy was called the Kiev-6C and took 120 and 220 film.
Had a quick look on
ebay and you can pick Autocords up between 50 - 500 dollars, some with and some without a meter.
It also depends if the person selling knows what they are selling

or not.
David :thumbup:
School of Photography.com