I just ordered a 27" iMac on Tuesday. I came across this forum and now I am nervous that my $3000 investment is going to be a big pain in my booty. The thing I am concered most about is the yellowing issue. I am a professional photographer an monitor color is probably THE most important thing for me. The reason I chose Mac, other than the fact that I have had it with PCs, is that every time i opened my website the color was so beautiful and the most accurate that i had ever seen. My callibrated monitor for my PC doesn't come close. This yellow issue is a HUGE deal for me. I know i can send it back for repair, but I am booked solid starting in march and my PC laptop can barely run Photoshop and I can't run Photoshop and Lightroom at the same time. Did i make a mistake? A friend said I should have gone with the 21" but it is so much slower. I ended up getting the i7, 2TB harddrive, and 8G of RAM, which I could not have gotten in the 21". Please tell me i made the right decision. Also, I hear there are MAJOR shipping delays. How long does i usually take Apple to build and ship custom iMacs? Thanks ahead of time for helping a newbie in need!