With prior military time it doesn't matter where you go. I know guys that were at my airline and left to United 6 months after hitting the line. Envoy, Skywest, and Expressjet are best in my opinion if you want to live in Dallas/Houston while you get some 121 time and get out. Skywest is the better choice of the three due to movement. Envoy is a good choice because training is in Dallas and offers a bonus first day along with good pay during training(regional standards).