I would personally like to move to Georgetown where I went to college. It won't be the same since the town grew from 9,000 to 60,000 over the years. It is still in a Republican area, but there are enough liberals that I would have a community of friends along with a lot of social activities. In addition they are finally adding public transportation in the city with four bus routes. Jimmy Carter delivered the commencement address at Southwestern somewhere between 15-20 years ago and drew a crowd of about 5,000 but I didn't attend because of work obligations.
If Georgetown isn't possible then Austin or Dallas would be my preferred options. The social life would be better in Austin because most of the fellow alumni from Southwestern that live in Austin are liberal, but the cost of living is pretty high (at least by Texas standards). Unfortunately they have gerrymandered Austin into five different Congressional districts and the only Democratic representative is Lloyd Doggett. The Republicans have tried to get rid of Doggett for years, but he is extremely popular even though he is in one of the "fajita-strip" districts that extend from Austin down to the Rio Grande Valley.