In this order IMO:
Indiana- first to go for GOP regardless of nominee except Romney who would lose it
New Hampshire- Anyone but Santorum would flip
North Carolina- I see it flipping but a moderate could lose it
Florida/New Jersey/Virginia- Given Obama's pro-Arab lean I see the Jewish vote becoming a game changer
Nevada- If Ron Paul or Gary Johnson are the nominee this will be a lock
Colorado/Ohio/Missouri/PA/Iowa- If unemployment numbers overall don't change or get worse they all flip
Minneasota= game over
Conneticut