I had a 24" Apple Cinema Display that was causing some serious flickering problems with the new Macbook Pro 13" that was recently released. So i gave apple a call and apparently they don't have a fix and offered to upgrade my 24" ACD to the new 27" apple cinema display for free. My question is, i was thinking of getting an iMac and i just received the new 27" display in the mail and its yet to be opened. So what are the chances i can bring this new display to my apple store and just pay the difference to get a 21.5" imac? Its an upgraded replacement, so im not sure if they'll take it back for a return to obtain an imac. Any idea's?