Given a $40 price advantage towards the Q6600, which one would you go with? General use, some CAD work and a little gaming. Also, anyone have recommendations for a good motherboard with a second x8 or x16 PCIe slot(x4 electrical is okay, just need a physical x8 slot for a RAID card)? I'd rather stick with an Intel chipset. Supermicro has a couple boards that look promising, but I dont see a point in buying DDR3 right now. EDIT: 2nd PCIe slot can't be adjacent to the main x16 slot or my 8800GTS will cover it up.