I had my iMac since Christmas. And I must say, I love it! I wish I switched to the Mac world sooner! I don't see any yellow tinge or gray bands. It's very quiet and the screen can be as dark or bright without any noise. :] Once I turned on my first iMac, I knew how to work it very quickly [because I've been working with Mac's for most my life] but this is my first Mac I ever owned. :] Just thought I should say that I got a perfect iMac. So don't worry about the problems when you first get it. You might not even see them!