I recently bought a mid level card. Didnt want to spend over 200 bucks so I went with a Sapphire Tech Vapor-X 5770 for under 160. Runs super cool, super low power consumption, Direct X 11 capable, and eyefinty(3 monitors as 1 screen). Keep in mind that a GPU is only as capable as your CPU. Dont want to spend a ton on a card and bottle neck its performance with an older slower Cpu. I run the i7 920, 5770, 12gb of ram, and use a xbox 360 controller for pc. Get an average of 60-80fps too with high settings and 2000 view distance. I do disable aa though. If your budget, cpu, and power supply permit get any of the 5000 series dual gpu cards. They own!!
:)