My advice... wait. Seriously. On June 4th, motherboard manufacturers will be allowed to officially launch their new motherboards based on the new Intel chipset, the P35. Asus has already prepared their new motherboard, the P5K3. You'll want to completely read this article at Anandtech to really see how much you would gain in future proofing, speed and upgradeability just by waiting a few months for a P35 based motherboard.