I believe that getting a bbetter GPU is actually better for gaming and a better future bet, get the 7950:
http://pcpartpicker.com/part/sapphire-video-card-111961920g
As you can see the 7950 is better than 270X in most cases besides the anti-aliasing processing, if it's more important to you. Just look here:
http://www.hwcompare.com/15682/radeon-hd-7950-3gb-vs-radeon-r9-270x/
Enjoy