My budget is less than $140, Rebates are NOT an option and i was wondering what is the best between the four for a 1680x1050 Resolution.
Saphirre Radeon 7770
http://www.amazon.com/Sapphire-Radeon-PCI-Express-Graphics-11201-17-20G/dp/B00A0HZOEA/ref=sr_1_18?ie=UTF8&qid=1361848097&sr=8-18&keywords=gtx+460
GTX460
http://www.amazon.com/Galaxy-GeForce-Mini-HDMI-Graphics-60XMH6HS3HMW/dp/B003VKGZSM/ref=sr_1_8?ie=UTF8&qid=1361848097&sr=8-8&keywords=gtx+460
550Ti for $138
http://www.amazon.com/gp/offer-listing/B004RJJN9Y/ref=sr_1_3_olp?ie=UTF8&qid=1361848097&sr=8-3&keywords=gtx+460&condition=new
Radeon 6850
http://www.amazon.com/MSI-CrossFireX-Eyefinity-R6850-PM2D1GD5-OC/dp/B004DCOZTS/ref=sr_1_2?s=pc&ie=UTF8&qid=1361848868&sr=1-2&keywords=6850+video+card
Saphirre Radeon 7770
http://www.amazon.com/Sapphire-Radeon-PCI-Express-Graphics-11201-17-20G/dp/B00A0HZOEA/ref=sr_1_18?ie=UTF8&qid=1361848097&sr=8-18&keywords=gtx+460
GTX460
http://www.amazon.com/Galaxy-GeForce-Mini-HDMI-Graphics-60XMH6HS3HMW/dp/B003VKGZSM/ref=sr_1_8?ie=UTF8&qid=1361848097&sr=8-8&keywords=gtx+460
550Ti for $138
http://www.amazon.com/gp/offer-listing/B004RJJN9Y/ref=sr_1_3_olp?ie=UTF8&qid=1361848097&sr=8-3&keywords=gtx+460&condition=new
Radeon 6850
http://www.amazon.com/MSI-CrossFireX-Eyefinity-R6850-PM2D1GD5-OC/dp/B004DCOZTS/ref=sr_1_2?s=pc&ie=UTF8&qid=1361848868&sr=1-2&keywords=6850+video+card