I suppose you could throw this in there http://www.newegg.com/Product/Product.aspx?gclid=CjkKEQjwzv-cBRD_oY2PouKVvMIBEiQAKuGNCw-OYwA_GzUlt8gILlty7TwRZXSrHBFeK6g-vBr9xenw_wcB&Item=N82E16814202052&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Desktop+Graphics+Cards-_-N82E16814202052&ef_id=U2PRNAAAAb-c17Pa:20140618004245:s
and run a crossfire with your APU. Or buy spend a bit of money and pick up, say a 260x or 270 and use that as a dedicated card. What kind of budget are you on?
200 would snag you a 2nd hand 7970, 280x, 7950 etc. Dont know what the situation is like there in the US, but there is so much dirt cheap mining gear going cheap here in oz (still under warranty as well). Something to consider anyways otherwise yeah r270 is good.