Purchasing a new video card

[LeRRR]

Whats the best bang for my buck gaming video card at the moment
Budget: $100-$200
Power Supply: 700w
Cpu: intel core 2 duo E6750 (2.66ghz)
Mobo: Gigabyte P35-DS3L
Prefer nvidia

 

[just a noob]

gtx 260, or a 4870 by ati

 

[lovely?]

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150361

best priced card for the money anywhere.