Use the Swiftech products, their new MCX159 series, they're the top of the line air cooling solution for your N.Bridge. The Zalman products are ok but they won't get you the performance of a Swiftech MCX159P.
-Intel PIV 2.4C @ 3.84G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800pro @ 490/780 -SB audigy -80G Maxtor Diamond Plus9 Ultra ATA-133 hdd -450 Enermax PSU