Considering MBA... I would be a first time Mac purchaser, Not a power user (replacing 10 yr old Compaq laptop running XP with only 512 RAM, etc. Hey its 10 years old. Normal word, Excel, ppt, growing, email etc. Probably will keep some photos and music, but larger video files etc. could always be on an external drive. $64k question...looking at Apple store Air refurb options... (Previous version) Fall 2010 11" dual core, 2/64 config for $699 (+ tax) (Current version) July 2011 11" i5 sandy bridge 2/64 config $849 (+ tax) (Current version) July 2010 11" i5 sandy bridge 4/128 config $999 ( + tax) Obviously I plan to keep this as a very useful and light portable for many years, even if I later add a iMac or MBP later. Thoughts or suggestions on best value and van for the buck?? Thanks in advance.