If you don't RAID or need the extra bells and whistles, then IP35-E would be a better choice ($71 AR @ MWAVE). Both boards share major eletronic circuits. Quite a few have pushed the Q6600 and IP35-E north of 3.6GHz. The quad will draw a lot of current from the output devices. Therefore, you should add a fan to the PWM heat sink to lower the temperature. You'll need to do the same with the IP35 Pro.