Hey All - Just bought two iMacs on eBay (accidentally won both auctions, going to sell one). Is there a way to tell if I got a bad/good screen before opening one of the boxes? Are the 20" inch iMacs even known for having poor quality LCDs? When I bought my MBP there was some yellowing issue going around and only MBPs with LG screens didn't have it. I was wondering if there were any similar issues with the iMac and if I should be looking for a certain panel. My iMac model # is MB323LL/A. TIA!