I'm going to sell my RMA'ed P67A-GD65 motherboard. Should I go with the ASUS P8P67 PRO or ASUS P8Z68-V PRO? Which is better in terms of stability and performance? The pc will be primarily used for gaming and video editing. Both the motherboards have the same amount of SATA ports and USB 3.0 ports. Z68 supports onboard graphics but does it cause any performance issues while using a graphics card? Also are P67 motherboards better for overclocking than Z68?