I just picked up a XFX 7770 Double D to replace my aging 260GTX and it's really not a bad card for the money. I got mine from CompUSA/TigerDirect for $115.00AR and I'm pretty pleased with the performance.
While it's a little more then a 7770, I just got a 650 TI today mostly cause of the AC3 bundle and the need for a cheap video, short video card. I really like it so far but long term is for me to get a 7950 in a couple of weeks and use this in a lower spec gaming rig.