Hey guys, Just got my 27" stock imac from an online retailer today. 3.06Ghz c2d etc. and absolutely love it except one thing. The HD seems to be much louder than my 24" imac that was basically inaudible. This HD on the 27" is a Seagate ST31000528ASQ 1TB, that seems to have an almost constant low buzzy, vibration-like sound that you can hear on the top right in the back when I don't have music playing? Anyone else experience this? Is this normal and is there any way to make it quieter? Thanks in advance.