If you can go up to 300, you can get XFX Double D FX-787A-CDFC Radeon HD 7870 GHz Edition
. However you can get 7850, and O.C it, to match 7870, also 7850 O.C well if you play with the V. Using third party software.
I ordered that 7870 yesterday to CF it my first one. Also i think 300 should be the price of 7870 to begin with.