Franklins if you want to stand in line for two hours. Or...drive 30 minutes South to Lockhart and hit Kreutz Market or Blacks; no lines and better BBQ...IMHO?
Black's in Lockhart, or Benny's east of Austin on 71 near McKinney Roughs. Black's has some great deer mounts, which are worth a trip.
Benny's is a roadside place with a picnic table, but darned good.
I've never been willing to wait with the hipsters for Franklin's. I hear it's good, just could drive to Black's, eat, and be back home with time left over.
Brisket and the beef rib are the don't miss items at Black's.