Spirit pays better than Envoy. It may be a good enough place to be "stuck" if SWA does not call right away. Envoy would be a path to AA with their flow, but since your goal is SWA, it's not much of an incentive. As far as getting a Dallas base, it all depends on what's going on at the time you get hired. To add to what Otterbox said, Spirit, Envoy, Mesa in that order. If you can commute and to improve your chances further, Sun Country for the B737 Type. Although the type rating is no longer required, it is still considered.