Burning 52,000
Sorry, I forgot to mention that regardless of where you decide to fly to, you should try to fly UnitedFirst instead of First Class on US Airways. You can use your US Airways miles to fly United and any other Star Alliance partner.
Currently, US Airways' first class product is probably the worst among major carriers. UnitedFirst is much nicer, you will probably get a decent meal served on china. US Airways uses plastic cups to serve beverages on all domestic first class flights now. Horrible.