CoolerMaster Ultra Vortex
 

When it comes to keeping your CPU chilled on air it's always a bonus to have a setup that'll be quiet enough for your wife to not throw the PC out the window. CoolerMaster seems to be taking a shot at Zalman's 7000 series CPU HSF with this latest Ultra Vortex and comes close in performance / noise. Check out the review at HTPCnews.com and see how well it fared in comparison.

http://htpcnews.com/main.php?id=ultravortex_1