OK, I have been waiting for quite some time to replace my Graphite iMac. The MBA may not be perfect, but I have been waiting for that too long! The MBPs are very nice, but I work as a pilot so I will be carrying it extensively. That MBA three pound weight is just too good to pass on. So ... As far as I can tell, there is no weight savings or battery life improvements to the SSD (or if there is, Apple isn't saying). It is unlikely I would fill either disk. Both choices should last as long as the computer itself. Upgrading from a 7 year old machine, even a 4200 rpm disk will seem fast. The list of things I could do with an extra $999 is quite long. So why get the SSD?