Well, I am about to get a 21.5" iMac and have been told by countless people to get Apple Care. With that said I have a few questions. First, is it $169 for one year or for the "up to 3 years" detailed in the description? Second, it says up to 3 years so after those 3 years are over can I buy another Apple Care pack for the iMac and extend the coverage for another 3 years? Thanks for your time and help.