Not seen one good thread Fluff - I've been getting bits of info from all over.
Shall we start one here as there's a few frogs going Quad core who could help with input? (I can split these posts off into a new thread if you'd like).
So you're definitely not planning to overclock?
Motherboards: Generally, any P35 board would be a good bet. Asus and Gigabyte seem popular, so that looks like a good choice if you want onboard graphics.
PSU: The Q6600 draws about 10A (I've seen figures of 105 and 130 Watts) at max load not overclocked, so any
high quality 500Watt PSU should do you fine. The Corsair models are extremely popular here so the 520HX would also be an excellent choice (they're based on Seasonics models). If you're planning on overclocking then the PSU becomes critical as you can very quickly approach the 18A limit on a single 12v rail. I do have a minimum single +12v rail psu for dual cores, But this is the Quad core thread.
Cooling: Is critical. These Q6600 chips run nearly twice as hot as the equivalent Core 2 Duo as they're essentially two C2D's slapped on one die. High end air cooling is probably almost required and certainly don't expect cool temps with the stock cooler. As usual, a lot will depend on your case temps and room temps. The high end air coolers are massive though, so keep that in mind depending upon your case. If you want to replace the stock cooler, then you're probably looking towards something like the Thermalright Ultra-120 plus 120mm fan to see any significant improvement.
Memory: If you're running at stock speeds, then no point in using expensive overclocking RAM. Quality DDR2-800 (or even DDR2-667) should do fine. Also note WinXP 32-bit won't support a full 4 GB, so probably best to stick with 2x1GB RAM). Crucial would be my choice too given their excellent warranty
