Ok folks, I've had my i7 8GB 1TB iMac since Nov. 26 and this machine is incredible. I thought I had the perfect system. THEN, out of sheer curiosity, I decide to check out the forums @ Macrumors. Yellow tinge, noisy HD, etc. So what do I do? Yep, obsessively check the screen (27") and yes, there is a slight yellow tinge at the bottom. And yes, the 1TB Seagate makes seeking noises (which by the way, I've been hearing for the past 22 years of PC / hard drive use). So as far as I was concerned, my system was functioning perfectly well until I read about the OCD Mac types who exchange their system 6 or 7 times expecting a different result. I would not even have the time to do such a thing nor the stomach lining. As for the "I paid $xxxx so I deserve perfection" argument, get real. I have friends who've spent $50+K on BMWs and have various issues. My $32K Accord is excellent but not perfect (rattles in various places, some fixed, some not). This is my first Mac desktop and it is by far the quietest computer I've ever owned. I am used to a helluva lot more noise from a computer and hard drive seeking noises don't even register. My point is that there are more important things in life than seeking perfection from your Mac. If the system is acceptable TO YOU, enjoy it and move on. Don't let the Howie Mandel wannabes on this forum put you on an exchange merry-go-round for issues that are still unresolved by Apple.