These guys are pretty good and won't screw you around. They have been friends of mine for a while now. I wouldn't hesitate to recommend them to anyone. Their prices are good and if I remember right they have various discounts. Cash, senior...etc.
Call Jim Wolfe with Enviromax. 832-347-0807 (cell)
He's a good Ag ('88) and has helped many texags posters, myself included.
I made an initial call to JIm, and a technician come out as soon as he finished up the job he was on at the time. He was friendly, professional, and only fixed what needed to be fixed with no upselling whatsoever.