First, let me apologize for another 11vs13 inch forum. Ok, so I'm getting a MacBook air for Christmas and I can't decide between the second spec 11 inch MBA (1.6ghz i5 4gb ram 128gb hard drive) and the base 13 inch. The base 13 is 100 dollars more but it's bigger and has a better battery life and it's .1ghz faster, but it's bigger is also a con. And I dot really need that extra .1ghz because i have a custom 27 inch imac, but the extra screen size would be nice. And the battery life would be a huge plus. And the opposite goes for the the 11 inch. Sorry for lack of detail im on my iPhone. If you need more let me know 