never been, but snow's in lexington, kreuz in lockhart, and smitty's in lockhart are highly regarded. in austin, franklin bbq is the new king.
Baker's Ribs on Voss just south of San Felipe. After having Baker's brisket, most other places have been ruined for me.
Baker's Ribs locations in the DFW area usually get pretty decent reviews, but I've never had them. They have a location in Minnesota, too.