I was going to get a ~$220 card, but came across this deal. This thing out-benchmarks the cards in that range by a huge margin, and with the sale is only like $50 more.
http://www.ebay.com/itm/291560857366?rmvSB=true
Replaced my GTX 275 last night, cranked all the settings up and played Wolfenstein for an hour and it was awesome.