My wife's 13" 2011 MBA base laptop will be 1 year old in 12 days. I think it's a good idea to always have a warranty on these skinny MacBook Airs and am looking at 2 options. A.) buy the additional AppleCare for $249 and keep the 2011 til November 2014. B.) buy a refurbed/open box 2012 base 13" MBA and sell the 2011 (I figure my net cost after transactions will be about $150-$170). She's not a power user by any means, but she really likes the 13" MBA form so its really the only 2 choices that I see. Option B gives her a newer and faster computer and 1 new year of warranty. Option A keeps what she has, but 2 years of warranty. Which choice do you think is best? Thanks!