It depends on what you want to do in the future. If it is working for Delta, I would say stay in ATL with ASA.

It might not be the fastest upgrade, but you will build time because we are short. Plus having days off and a good contract to do other things (volunteer) helps out. Commuting is terrible and upgrading does and will not matter in the future. Sure it adds a couple brownie points to your app, but it also depends on a lot of other factors to move on.

Otherwise, move to wherever you choose.