Athlex, actually I have grown accustomed to sleeping with ear plugs in.
I can almost not hear the 7500 rpm delta that way, it is 20 feet from my bed.
When I have to power up the 120mm fan for extra cooling during the hot days there is always the big 20 inch box fan sitting in the window that makes so much noise I can almost not hear the computer at all.
With 4 machines crunching seti in my bedroom I am slightly amazed my wife puts up with it! The earplugs help me but I don't know what she thinks about the noise, she doesn't seem to mind?
I've thought of encasing a 486 board in some kind of plastic goo and freezing it and overclocking it to like 300 mhz to crack RC5 on. I have a little space in the freezer you know...