Can anyone recommend a good CPU Fan and Heatsink.

Im looking for the quietest i can, but ihave a budget of around 20, less if possible.
I'v just brought an Enermax PSU, and now my CPU fan is the loudest.

Any Ideas.

Cheers
Chris

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TBird 1Ghz
Abit KT7-Raid
320Mb
10Gb & 6Gb Fujitsu HD
LG 4x2x24 CD-RW
Creative 12x10x32 CD-RW
16Mb NVIDIA RIVA TNT
Hauppage Win-TV Card
Realtek RTL8029Nic
Win ME & Win 2K