Am DL Diamond, did the 45k challenge and qualified for EXP for 2013. I have spent about $15k on AA and will fly AA Intl and should re qualify easily.
With DL ridiculous Rollover I automatically will be Diamond for many years to come. Being ATL based I will still do 125000 and manage 100000 on AA.
I am enjoying AA after being a DL loyalist for many years. I am fortunate to have top tier in both programs. It's good to have options.