This is a good article to read. http://www.tomshardware.com/answers/id-1897549/apu-handle-290.html
I'll be lazy and let you decide based on your needs. I think a 7870 or a good 7950 from amd or a 670 or 660 ti are good for their price if working on a budget. The gtx 770 is the best price for performance in stock right now but that could easily change with amd prices falling.