The Masscool by Fanner Tech is one of the best thermal solutions for
PCs. It's really quiet, has low thermal resistance and rock-solid
durability. Check it out.
The specific model I have is the MASSCOOL FD06025S1M3/4 (60 x 60 x 25mm
Sleeve Cooling Fan). You probably can find it at newegg.com. It's
inexpensive and it doesn't sound like a jet is taking off inside your
computer. Good deal all the way around.
By the way, if you need help on installing that new CPU fan and
heatsink, check out this article:
http://www.build-your-own-computers....-heatsink.html