If you could vacation anywhere in the US where would you go?

my husband comes home from Iraq in October and his parents have VERY generously offered to send us anywhere in the united states for a week, hotel and airfare. We'll be leaving the baby with the grandparents and having our honeymoon (since the deployment cheated us out of a honeymoon when we first got married), so I'd like to go somewhere romantic and fun. It'll also be around the same time as my 21st birthday so nightlife is important. Just looking for some ideas, thank you!!