Just to drop in this thread I'll leave something I found :
At techbargains.com they have a link that will activate a rebate + coupon code to get a 1GB 7850 for $99.99
At that price, I think it'd be insane to spend more. That card will eat 1440x900, 1600x900, 1680x1050 alive, and even do well at 1080p in most titles.
"Newegg has the PowerColor AX7850 1GBD5-DH AMD Radeon HD 7850 1GB GDDR5 HDCP PCI-E Video Card for a low $99.99 Free Shipping rebate and Coupon Code: "AFFW85VGA" (Exp SOon). Tax in CA, NJ, TN. This is $30 less than elsewhere and the lowest price we've seen. [Compare Prices]"