I have the same CPU. I use the Vantec Areoflow Great fan!
http://www.cluboverclocker.com/reviews/heatsinks/vantec/va4-c7040/
P4 1.8a @ 2.25, Radeon 9800Pro 380/340, 512mb Corsair xms DDR333, Audigy 2ZS on Boston Acoustics B7800 4.1's, Western Digital 7200rpm 80gb SE, Antec True Power 480W