So it appears the one and only difference between the $1299 and $1599 13 inch models is the 256GB option in hard drive--(I'm not interested in the $100 i7 upgrade)--now I have read that 3rd party flash hard drives are a possibility in the MacBook Air...and yet those very same upgrades which are sold in limited retailers like OWC seems to cost far in excess of the $300 Apple is charging for the bump in capacity. I guess my question boils down to this--would the smarter move be to save $300 right now in the hopes of being able to upgrade the hard drive at some future date for less than the amount Apple currently charges, or simply go for the 256GB option now at what miraculously seems to be the cheapest option provided by Apple as of today? I get the sense that the price for flash memory in this particular "format" is not falling as rapidly as has been the consensus and I'm not sure whether waiting 2 or 3 years for an affordable upgrade solution is worth it at the moment? In any case...I'd really appreciate some advise and/or thoughts regarding this issue, so that I can make a decision with the most accurate information possible! Thanks in advance... EDIT: Oh and one more thing, I wouldn't mind the sacrifice of using an external hard drive for heavy media files--and since thunderbolt is now implemented, it would be the most common sense approach to use a thunderbold external drive--but again, how much longer do we need to wait to see affordable 500GB-ish TB drives on the market to take advantage of the port?