At 1.6GHz, my P4 peaks at 34C. At 2.56GHz, it peaks at 45C or so. This is with the retail heatsink.
YOU WILL BE WASTING YOUR MONEY BUYING AN AFTERMARKET HEATSINK!
They will offer you NO higher speeds, and LITTLE, IF ANY decrease.
The retail heatsink is quiet, big, and works as good as ANYTHING else out there.
You keep saying you're an Athlon user; you can't help it --- THIS ISN'T AN ATHLON!
Northwoods do NOT benefit off of a better heatsink. At least not noticeably. Things are different on the dark side. Buying an alpha is just like dumping a fifty dollar bill out your window. Pointless. Plus, the retail heatsink is SO much easier to install. Installing the alpha is almost like installing an AMD heatsink 😉
Edit: Sorry for yelling.