There are fine outlets in TX. One I personally know well and can swear by is KRTraining at www.krtraining.com
in the Austin Area. Karl is a great teacher and offers an entire sequence of training.
There are several outlets in Dallas that seem quite good. Steve Moses works out of that area.
I'm sure other folks will add to the list. Many well know trainers frequent different locals in the Dallas, Austin, and Houston areas. Tom Givens, John Farnham, Andy Stanford, Massad Ayoob, SouthNarc, Paul Gonzales, Jeff Gonzales and the Insights crew have been through.
The issue has been discussed quite a few times on Glocktalk's Texas and training subforums as well as here.
You can't beat Karl for the price and convenience