I had one and fitted it with all the various speed controls, and hated it.
Talk about noise! If I ran it at about half spped it was bearable, any more and too much. Full blast and intolerable.
What I have done though is take off the "Snail" fan and replaced it with a 80mm Zalman fan and a 60mm-80mm converter. Silence and I can honestly say the copper heatsink is very good. Expensive way to go about it though!