Perhaps one of these one be a good choice, depending on which camp you prefer:
Newegg.com - EVGA SuperClocked 01G-P3-1461-KR GeForce GTX 560 (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
Newegg.com - SAPPHIRE 100314-3L Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
What exactly do you want out of your card?
If gaming is not something you'll be doing there are cheaper cards to be had that will do a great job for Video etc.
Either of these would be decent for gaming in this price range.