I have the basic 11" with 128 SSD. How is the battery life on yours? According with some reviewers the difference between basic and ultimate would be 15-30 minutes at most. It may seem insignificant but I love mine's battery life because it can hold an "whole day" of typing at classes hitting a shy over 8 hours ! Or better, has anyone managed to test both machines' batteries ? Will I feel any difference? What do you recommend? ultimate or 1.4/4gb ram? Battery Life is important for me. I am tempted to swap my basic for an ultimate, just because of Lion and future OSX (/XI) releases. It seems more than likely for Lion to run just fine on basic, although I do worry a bit. I will be keeping my 11" (main & only machine) for a longer time (another 2 years at least), so while Lion might be ok, the next ones are surely doubtful. EDIT: Keep in mind that I won't do any gaming/PS or intensive tasks. The upgrade is ONLY for future OS releases and peace of mind.