Down in the Keys the Thunderbolt is a wonderful dive. So are the Duane and the Bibb. the Wilkes-Barre is a world class, Doria type dive for advanced techies.
Second that. (Hi Thal) The Spegiel Grove is a cool dive. Big! The Duane is one of my favorites. It can have a ripping current over it, though.
It's not the US, but there are some good wrecks in the Bahamas. There are several around Nassau and it's not far nor expensive, relatively speaking.