I think GTX 670 is the best card in that price range. http://www.newegg.com/Product/Product.aspx?Item=N82E16814130787
Check out it's review:http://www.tomshardware.co.uk/geforce-gtx-670-review,review-32443.html
Quote from the conclusions:
Maybe this time will be different and we’ll see GeForce GTX 670s in sufficient quantity to satisfy the folks previously priced out of the ultra-high-end market. If that’s the case, then hell yes. GeForce GTX 670 is a phenomenal little board that blows right past the GeForce GTX 580—a card that was introduced at £400 a year and a half ago. It offers the display connectivity to contend with Eyefinity, one of AMD’s prior differentiators, and its efficiency is currently unmatched. We have every reason to recommend buying a GeForce GTX 670—even as an alternative to the GeForce GTX 680, which is marginally faster, but 25% more expensive.
Basically, it's second fastest GPU in the market, and has insanely high performance for its price.
P. S. I am sorry other people have trolled you.