Hi all. I have a 3.06 24" with all the trimmings, running iStat Pro as a widget. CPU and hard drive fans idle @ 1200 rpm and hard drive fan @ 700 rpm. Thing is.....I thought iMacs are supposed to be almost silent? Customer care have been excellent so far and a replacement was sent pdq but was slightly worse on the decibels - so that went back. As a recent convert to Apple, I am used to screaming fans courtesy of big bad Bill, but I must say that the constant background drone is becoming annoying. The computer itself is fantastic....all that I had hoped for. I'm just disappointed with the 24/7 background noise that sounds like fan/fans activity. Any thoughts or advice?