Supposedly on Feb 15th, the new AMD Radeon HD 7770 and 7750 is launching. If that follows suit with the X770 and X750 series in price, it should be around ~$150-$160. That's in about a week and probably going to be your best buy for the budget. I would wait for some performance reviews to come out first, which should be like by the day after its launched at the latest. If not got with an AMD HD 6770 or even an HD 6850(even better if you can make it fit in the budget), but I would still wait for the launch because that might cause a price drop to get it even cheaper.