A regular GTX 260 is a great card. Many do 660-700+ on the core. Price vs performance they are a solid choice. With rebates you can get a GTX 260 down to 225usd @ Newegg now-
If you don't want to mess with rebates PNY and MSI have 260s for 240usd. If you're planning on keeping your card more than a few years get an XFX or Evga for their lifetime warranties.