Current tower coolers are usually either loud or very expensive. To my mind Zalman has here (finally back !!!) hit the jackpot. Tips optics, super quiet and cooling capacity is more than sufficient. I run a faintly overclocked, but completely unlocked AMD Phenom II 960T. The installation is very easy and even for less experienced hobbyists easily.
A great recommendation for fans quieter PC that like to have cooling reserves. For extreme overclockers he is certainly less suitable.