I've had my i7 iMac for around a month now, I'm really liking it, no issues with HDD noise or yellow screen colours, the only thing I don't like is 27" mirror like screen, why oh why must we suffer these glass glossy screens, unless you are in PITCH black darkness you will have glare, they make the computer look great except when it's turned on, I could rant all day how much I hate them
.. anyway I got one of these
Reduce Glare on MacBook, iMac and Apple Cinema Displays with ClearCal Anti-Glare Film - RadTech Products asap now things are much better