Trying to decide between the 2011 13" 1.7 i5/128GB Air and the late 2011 13" 2.4 i5 500GB Pro. Did some searches online and haven't really been able to find much in the way of direct comparisons between the two (only the 2011 Air vs the early 2011 Pro). Not looking for anyone to make the decision for me, just trying to make sure I have everything covered. Came up with a pros list for each and it currently looks like this: Air Positives Higher resolution Flash storage Lighter Pro Positives Faster clock on the CPU Upgradable RAM More internal storage Am I missing anything obvious there? I know the optical drive isn't listed for the Pro, but I'm not entirely sure I really care about that. Are the processors on the two apples to apples, with clock speed being the only difference? I want this laptop to last me several years and I worry about the Air's processor and the fact that you can't upgrade the RAM in terms of its ability to keep up with OS updates and the increasing size of apps.