My vote goes to Salt Lick outside Austin for Best Brisket and Best atmosphere.

I am a firm believer that the more the place looks like it's going to fall over, the better the BBQ, and for that reason, and because I always eat myself sick, Best Ribs goes to Cattle Drive, southeast of Houston.

Admittedly not the best in the USA, but they are plenty delicious enough for an Honorable Mention, and will most likely be catering my wedding, is Sagebrush in Grand Lake, CO.