Modern and classic accomodations in the heart of South Beach.
Beautifully restored with the Art Deco motif preserved, The National has nice rooms and a beautiful pool. Service is low-key and friendly. Also, the location can't be beat--next door to The Delano, if you want to go for some partying.
If you want something in South Beach, my vote is for The National. It's right next door to The Delano, but it's much less expensive and I think the rooms are a lot nicer. You can just wander over to The Delano for their bar.