since your asking about next year's games:
get a GTX 670 and deal with the cpu when it gets hampered by some cpu intensive games. if piledriver is all that then just get the best one you can and drop it on your motherboard (i believe it will be compatible with AM3+).
if it is not what is hope for than get an intel platform; worse case senario is you wasted a few months waiting. and with haswell not being released until late next year; you'll still have ~12 months.