Olympics 2016-where?

The US will probably be bidding on the 2016 Olympic Summer Games. We all know Chicago is interested but lacks a definitive venue for opening and closing ceremonies and track and field events. What cities in the USA do you think would make the best candidates for hosting the 2016 Olympics? LA could do it but it has had two games already. NYC lacks a central stadium as well and would have to hold much of the games in New Jersey. Philly?, Miami? Seattle? SF? Denver is out because the Olympic committee will never forgive the fiasco of cancelling the winter games in the 70's. What cities should be considered?>