Envoy, it's a no-brainer. DFW isn't going anywhere, whereas there is already talk of Mesa getting the boot from DFW. Rumors only, but I see it happening in the near future.

While the upgrade is at 8 years now, don't plan on it staying that way. Our upgrade is projected to drop to 2.5 years, and while it's certainly not a guarantee, the numbers point to it likely being the case. There's always the flow to AA as well.

Do your research, but being from Texas, I don't see any reason not to choose envoy if you get the offer. Good luck.