I will be purchasing a MacBook Air. I don't have a need to get the i7 with 8gb of RAM, ( as of now). I know the i5 4gb would be fine for my use. However, my question is should I spend the extra money to get a higher spec MacBook Air or just get the base? I'm trying to decide if by upgrading the Air is worth the money in the extra amount of time I will get out of it. Secondly, from what I researched the i5/i7 only turbo boost in some apps that are optimized for the chips. How popular is the support for the ultra low voltage i5/i7?