Hi, My old iMac from 2008 just die on me and I am planning in buying a new iMac. I have been doing some more research and I have notice that recent models 2011, 2012 are having issues from hard drives to screen dust to over heating. I can understand that not all situations are the same and buying the Apple Care always comes handy in moments like that. My question now is, how ofter is a good practice to refresh the Apple hardware? 3 or 4 years? as soon as the Apple Care runs out? Note: I am planning on buying an iMac and sell it in eBay 3 years later to use the cash to buy a new one. Is this a good idea or should I just wait until it dies?