I've also been advised not to take prereq courses at community colleges, because adcoms may become suspiscious that you're using it as a strategy to get a better grade. Some schools' departments have reputations for being easier than their counterparts at other nearby schools, and therefore tend to attract premeds. I know of one notable example concerning two UC's.
Otherwise, though, it doesn't matter all that much. The best idea is to go to the school you can do your best work at. Amount of research opportunities, proximity (or lack therof) to your family, general academic reputation, the campus, the majors offered, athletics, the social life and the student body may all factor into your decision to different degrees. Just decide where you can feel comfortable and excel; good grades are paramount.
And while it may sound counter-intuitive, parafilm's comment isn't necessarily total nonsense. It's very easy to get burnt out if all you do day-in and day-out is study, even if you really enjoy whatever it is that you're studying. You're entering four full years of work, and the pressure can get to you if it's not released somehow. Don't go out more often than you can handle with your study habits, and don't feel obliged to party if you don't like partying, but be sure to relax and hangout every once in a while. The college years are about priorities and compromises, not absolutes.