in reply to mekboys post, do not buy an adapter, total waste of money if your planning on buying the WBK. the WBK hs takes an 80 mm fan or even a 92 mm fan w/o the adapter. i've done it. easy as pie and works well. adapter will just set you back about $20 bucks and you won't really see much benefit.
now on my golden gate/gladiator, if i wanted to put an 80 mm on this one, then i would have to consider an adapter, but not for the WBK.