Graphic card upgrade

[borden5]

hi i have a studio xps 435mt i7-920 with silent pro m600 watt psu, i want to upgrade my GPU with price range in $200-$270 so i narrowed down a few :
gtx 470
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130550&cm_re=gtx_470-_-14-130-550-_-Product
hd 6870
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150506
gtx 560 ti
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604&cm_re=gtx_560-_-14-130-604-_-Product
hd 6950
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150518
i don't plan to dual GPU soon because my motherboard only have 1 pci 2.0x16, i will run game in 1920x1080 23" monitor and i think my case can fit any of them just fine. Which one should i buy and why. Thanks for reply.

 

[minitron815]

Go with the GTX 560 or HD 6950.

For the GTX 560 go with http://www.newegg.com/Product/Product.aspx?Item=N82E16814127565

For the HD 6950 go with http://www.newegg.com/Product/Product.aspx?Item=N82E16814102914

XFX lifetime warranty thing is more of a marketing tool than it is actually helpful since a 3 year warranty is enough for video cards.