Not in Austin, but the best burgers in Texas are at a place called Storm's located in Lampasas and Burnet. The Storms Special is a triple burger that is awesome. They use thin, fresh ground beef that makes one mean burger. If you are ever headed north on 183, or on 281, I highly recommend trying it. (Just a warning - they're a little greasy, but what really good burger isn't?)
Hook'em
Wes
Hook'em
Wes