Apple failed me last night because they didnt release the next gen macbook pro...but its ok..i have decided to buy the 2012 of cmbp 15 with 5400 rpm hard drive. However, I have been using my friends' retina pro and air with SSD and I didnt hear any noises from the machine while operating. So, iam just wondering the noise level of cmbp 15 with 5400 rpm hard drive comparing to the retina or air with SSD? Is the noise level pretty much unnoticeable in a quiet room while you are just doing casual work( web browsing, watching videos and word processing etc) . Thanks 