If Peyton wants to play with some serious offensive talent, he should seriously consider Kansas City--they've got players. Good football city, with tradition, but not sure it's a great place to live.
Miami seems to be one of the favorites. Great place to live, excellent weather--but it's a WEIRD sports town. Not a genuine sports town at all. Too much glitz. New York City is a much better sports city than Miami. And is Miami ready to win? They've got Bush and the WR, decent/above average defense. Is it enough?
Denver: Good defense, but not much WR talent, not sure the coach will let PM do his thing--and I can't imagine PM wanting to deal with all the tebow nonsense. A lot of the christian crazies in colorado love tebow. They'd love Manning too--until he loses a game. Weather not so good.
Arizona: Great receiver, great stadium, good weather: not sure what the talent base is like or how ready they are to win.
Seattle? Maybe a darkhorse! Nice organization.