Well, on that chart all cards above 650 are pretty expensive.
jinayhvora has already offered the best solution. While the gtx 760 was released after the chart was published, it is in the same tier as the 670. @ $250, it is the best card in your price range.http://www.tomshardware.com/reviews/geforce-gtx-760-review-gk104,3542.html
It trades blows with the 7950, occasionally coming out ahead of even the boosted version of the 7950. If you can find a 7950 for $250 or less, it's a viable option as well, but the only way I've seen to do that so far is through mail-in rebates.