At the Apple store, I went thinking about buying the 13 inch, but fell in love with the 11 inch. My purpose is web browsing, some picture editing, and writing..I am a going to use Microsoft word. Mostly will be writing, writing, writing. Portability very important. I am considering going with the base model. I can pay for the upgrade in RAM and storage, but want to make the sensible elegant decision. I hear some talk about the Lion upgrade. Why should I even care about that?Will I need it? Why? How hard is it to write on this size machine? Also, I was going to buy it from the source listed on the Insider website. Do I pay tax? Do you suggest getting the extended warrantee? Thanks!