Untill the 660Ti is out which may but problebly wont come in under $300
The best card for the money is a 7870 at $255 after rebate.
http://www.newegg.com/Product/Produc...82E16814103208
Or if you want to keep to the lower end of your range a 7850 for $219 after rebate.
http://www.newegg.com/Product/Produc...82E16814150608
But none of those 3 cards have much of a shot at PS2 in high with a decent resolution.