So after giving up the new iMacs after two replacements about six months ago for yellow screens......I thought I would try again. The good news is that the white is very uniform with no yellowing. The bad news is that it has this dark band across the bottom of the screen just above the dock. So I am basically in the same spot I was six months ago. Replace the unit for a new one, replace the screen, or just live with it. Maybe I am being too anal but for $2,500, I shouldn't have to live with anything but a perfect screen.