I am planning to buy a 27" iMac, Core-i7, max clock speed, 8GB in the coming 2 weeks. I cannot get it locally which requires that I order it from Apple. No problem, under ordinary circumstances. My fear: I could get the machine and it will have some dead pixels. My only experience with dead pixels was very annoying. In fact, they were not a big deal, but every time I turned the computer on the dead pixels was all I could see. Question: Does anyone have experience with attempting to exchange a Mac with Apple when it has dead pixels? Does anyone know, for sure, what the Apple policy is?