You really can't go wrong with any on your list, depending on your requirements of course. My quick suggestions would be the FM3A, F1 and AE-1, RTS III and G2, and/or the M3, with particular emphasis on the G2. But whowantstoast has a really good point about medium format. And while the Bronica are very nice, Mamiya 645 Pro is just as good and a bit less expensive. The chief drawbacks to medium format are that the film may not be readily available where you live, and 120 processing isn't done at your local drug stores.