Heres some reading...remembe, if fan noise is a concern at all:
"Speaking at large, the Scythe Ninja, Zalman CNPS9500 LED and Thermaltake Big Typhoon are about on the same level of efficiency, so your choice of the cooler should depend on other factors like price, availability, ease of installation and fastening on a particular CPU socket. Some users may also be guided by their personal sympathy or dislike to a particular brand, for example. But whatever cooler of these three you may choose, you wont be disappointed. As for the Thermaltake Sonic Tower and Scythe Shogun, I wouldnt recommend them for purchase because there are better, more efficient, quieter, simpler-to-install and cheaper models in the market."