I get the impression from your various threads that the attractiveness of the student body is very important to you. Nobody can tell you whether or not you’ll find students at a particular campus attractive; you’ll have to visit and decide for yourself.
In my opinion, leaving behind your “stuck up prep school” means more than changing locations. It means checking your own attitudes at the door. New Englanders, for instance, can be preppy without being pretentious. If you want a “different…social atmosphere,” perhaps you should consider selecting a school based on the strength of its academics and relative affordability, not how many boys would make the cut for the popular table based solely on their looks. We Northerners would like to see our sons valued for their brains and contributions to their community, not their physical appearance.
I agree that if you don’t have a clear 1st choice, don’t go the ED route. Keep your options open.