I *strongly* urge you to do more research than what's been suggested thus far. Both of the urls posted are wonderful resources but salaries can change rapidly and these websites aren't always up-to-date.
You might consider contacting local headhunters but be warned they'll work you for the job you're looking at. Maybe pretend you're interested in their help and harvest salary information from them.
Also consider asking some of your peers for salary ranges – it's rude to outright ask what they make but you can ask what they believe what the fair market price is for your skill set and experience.
One headhunter that works a lot in Texas is Guy Tucker. Guy is based in Atlanta but he knows your market. He can be found at
http://www.askguy.com
Good luck,,,