For sure you should go for the flow. Go to psa or piedmont. Envoy has the longest flow for new hires. For some reason they have a much higher percent of people holding out for flow than the other 2.
By all means keep your apps updated and try like heck to get on somewhere else, but ask yourself in 5-10 years and no one else has called, would you rather be at american or possibly still stuck at a regional?