If you want to get video off the iGPU on that processor, then the Z77 platform. If you have no need for the iGPU(which often helps when troubleshooting a discrete GPU issue) then you can get the Z68 chipset board.
My brain read P67 in spite of my eyes seeing Z68. Either one will get the job done. If you intend to drop in a 3rd Gen Intel processor later down the road then perhaps look into the Z77 platform but essentially they are the same.