Salt lick bbq is Near Austin or you can head to Lockhart TX which is about a half hour away, there are 3 of the best joints in texas there.
Smitty's, Kreuz market, and Black's.
Smiths and Kreuz are pretty much the same due to one being a spinoff of the other due to a falling out several years ago.
Check out texasmonthly.com for a list by city of the top joints