Can you stand to live in Mem LAX or ANC (or CGN or HKG). Are you a little bit of a risk taker and can you stand a few years of leaner living? If yes I would go fedex. Upside at Fedex is much higher. Downside it depends on your future prognosis for the economy, are rich people more likely to stop flying or are packages more likely to stop moving due to fuel cost or terrorism.
What percent at NJA are you.