It's been a couple of days I've had this new 27" iMac and have noticed that there is a small black dot on the right side of the screen, which can not be removed with the black cloth included with the iMac. I am assuming this is a dead pixel. Should I be getting a refund or exchange? Or just let keep it? (Chances are if I get a exchange, something like this might happen again or I will even get something that will even be more frustrating.) The black dot can been seen very clearly when brightness is at the maximum. However, if the brightness is in middle or below, it is harder to notice the black dot. Sitting and not being too close to the monitor makes the black dot harder to notice) I don't know what should I do. What are the chances of me getting more dead or stuck pixels? Also, what are the chances that I'll get another iMac with this problem?