Welcome to A2K, traveler.
These are two of my favorite cities to recreate in; I have lived most all of my life in Southeast Texas, and in Houston for the past twelve years.
Austin in particular is unique in that it is the state capital as well as home to the University of Texas. It has a lively entertainment scene.
I believe that your opportunities to further your acting career (having seen your other threads) will be much greater there. Look, I found this:
Austin Arts Search
As an aside, some of us regulars on this here board will be gathering in Austin in October. There's a thread kicking around the events elsewhere on the forum.