Okay, I'm looking to start shooting more medium format, right now, i have a $25 TLR that i'm using that isnt the sharpest thing on the planet, and a holga. My budget is kinda tight, but i've narrowed my choices to a few cameras. Could you guys chime in and tell me which one is the best one?(great question, i know.) Option 1) Mamiya M645 M645 SUPER WITH 110 F2.8 (58), PRISM N, 120 SUPER BACK, POWER DRIVE N. Option 2) Mamiya RB67 RB67 WITH WAISTLEVEL, 127 F3.8, 120 BACK Option 3) Pentax 645 645 WITH 75 F2.8 SMC A (58), 120 INSERT Option 4) Bronica SQ/SQA/SQAM SQ-AI WITH WAISTLEVEL, 80 F2.8 PS (67), 120-I BACK Option 5) Bronica ETR/ETRS/ETRSI ETRS 20TH ANNIVERSARY WITH 75 F2.8 EII, 120 BACK, AE-II, BROWN LEATHER Option 6) Bronica ETR/ETRS/ETRSI ETRSI WITH 75 F2.8 EII (62), 120 EI BACK, PRISM, SPEEDGRIP E so many choices.so little knowledge.