so these two chips are roughly the same price. the core 2 quad kentsfield 2.4 ghz $189.00 the core 2 duo e8400 wolfdale 3.0 ghz $164.39 the plan is to install ubuntu and then virtualize windows xp. the general rule is when running heavy apps like a virtualization program w/windows xp to go quad core but the speed in the dual core could make a big difference. also keep in mind the system is 4 gigs ddr800 ram. so plenty of ram to run it so i may not need the quad core.