What he said. 6th Street is about four blocks of nothing but bars.
The barbecue he is talking about is in Lockhart, which is about 30-45 minutes southeast of Austin. Lockhart is the official barbecue capital of Texas, seriously. I prefer to go to Kreuz barbecue in Lockhart. To me, it just tasted better. Also, they don't charge you for the extras like pickles and onions, Smitty's does. They're sausage is really good.
If you're looking for barbecue spots in Austin, the best places are The Ironworks (it's closed on Sundays) and The County Line. You can pretty much tell what I do when I go to Austin, eat barbecue.