FYI, I actually love AA, so I don't mind paying for the upgrades. Bear in mind that the coupons aren't that expensive for Platinums...$31.25 for each 500 mile segment, when you buy 9 or more. My company actually lets me expense the coupons! AA has transcons from IAD-LAX (as does UA). Your upgrade window of 72 hours usually results in a 70-80% upgrade probability. (Except on very busy routes/times). Good luck with your decision.