Also, in order to run your GPUs in crossfire you will need two of the same cards. Meaning either two 4670s or two 5770s. However, for an extra 100USD you could get two 6850s.
I thought of same mobo, but as AM3+ is there in market so i thought i should go for it. Also im gonna change my CPU once the bulldozer hits the market. So please suggest some with AM3+. BTW thanks for GPU suggestion, i will go for it. xD