Looking to buy 1st mac in a long long time. An aluminum MacBook. What are the advantages to buying at the Apple corporate stores vs online or big box stores? I am hoping to take advantage of the 12 month 0% offerings at Amazon or Best Buy, but won't if there are compelling reasons to buy at the Apple Store. -Will I get the same treatment for warranty/defective exchanges? -Are the free classes still available if you didn't buy at the apple store? -Genius bar assistance? -Migration of files from PC to Mac assistance? -Any other things I'm not thinking of?