I have a richland apu build, and I want to add a graphics card. Should I buy a radeon 7750 (which is crossfireable with the apu, don't give me crap on that), or should I wait until the HD 8000 series?
Depends how much you want to spend the 7750 in CF with your apu will work fine but if you have more to spend look into a 7790 or 7850 2gb or something.
7850 is the way to go I'm putting one in my new gaming build with a 3570k and I know this will max most games or near ( for games like bf3).
7850 is a good low cost option that will be ok for your APU. Think the key thing here is to get you up to a good level of gaming experience. If you wait for the 9000 series (8000 series is rumoured to be OEM), you're going to be waiting longer to get the same thing.
go with an nvidia card for gaming, gtx 760 is good
berserker, can the 7850 be crossfired with the apu? The 7750 can.