Your best bet is to purchase an HD 6570, and you can crossfire this with the 6550D that the APU has integrated.
Scratch that, it is actually probably your only option.
It will be quite a bit faster, but lower frame-rates might irritate you more due to some microstuttering.http://www.newegg.com/Product/Product.aspx?Item=N82E16814150613
This card is on sale right now, and has a rebate. The end price means you only pay $40 for the video card.
Other than this, your only option would be to rebuild with a non APU based PC, which would not be cost effective.