Pentax 67! Superb. I bought a complete late system last year with 45, 90, 165, and 300 for US $1500. All near mint. I bought it to replace a Mamiya Universal 6X9......but it didn't. I kept both. The Mamiya is also superb and has some strengths over the Pentax. Just for the sake of pissing all the square format guys off; Bigger is better. If you buy a 6X6 you really bought a 6X4.5 if you want to put them on a normal piece of paper. That turns out to be half frame of what the Mamiya Universal can do normally. I have more than a few 20X30" pieces on permanent display that were originated with the Mamiya 6X9.