I'm thinking about getting an iMac, and I've concluded that as much as I would like a 24', I really don't have the space for it. So that leaves me to choose between the old white and the new Aluminum 20' iMacs. There hasn't been much recent dicussion on these boards about the 20's screen issues lately, other than a recent thread that suggests that many of the issues are actually due to poor factory calibration of the screen. Has Apple reduced this problem on more recently produced 20' iMacs? Was it never much of a problem? Or is it just that the screens continue to be of poor quality, and there is nothing new to add to the old discussion?