Try this place for great enchiladas and popular flavored margaritas that should come with warning stickers: "Muy bueno!"
13609 N. I-35, 512/670-9111
You'll find the same big plates of gooey Tex-Mex goodness that lure you to the Barton Springs location, and quite a bit of the same atmosphere.
10520 N. Lamar, 512/836-3218
In addition to standard breakfast-taco fare (with bacon, egg, potato, chorizo, etc.), this place serves chicken, carnitas, and barbacoa tacos as well as burritos.
9320 N. Lamar, 512/873-8602