I recently bought a new current 27" base model iMac and still have my Early 2009 24" iMac that it replaced. The new one took the place of the old one in my very quiet office and I moved the old one to the family room. With my 24" model, I literally could NOT hear it when it was running. It was dead silent and I was always amazed at this. However, since I got the new 27" model, I can definitely hear hard drive and fan noises even when it is not really doing anything -- just idling in the background. It's not LOUD exactly, but definitely louder then the old one. Has anyone else noticed this about the newer iMacs? What is different about this one? Is it indicative of a problem?