Get Thee to the Mileage Running topics on FT.
If you're based out of ORD, you might be able to cash in on the UA Double EQM promotion. Even with the minimum W fare, 15K miles should fall well below $1,000 if you're flexable and do it right.
If you're planning on flying UACO for your Asia/Europe trips next year, the 6 x SWU might come in handy (search for other topics for SWU use/success/failure).
In the end, it's your money. Read up on how the UACO program will change in 2012 (fare basis/status/buy ups/upgrade instruments). Decide what's best for you.
See you in the air.