I'm in the market for the 13" model and I'd like to get the 4gb of RAM in the base model. Unfortunately being that I live in California I'll have to deal with 8.25% sales tax on top of the upgraded price of the laptop. This ends up putting me over $1500 for a base 13" with 4gb of RAM. I can get the 13" with the stock 2gb of RAM off Amazon shipped overnight for $1300 and no tax. So is 2gb of RAM really worth ~$225? I have an i7 iMac as my primary machine and realistically don't see doing any heavy work on the Air, but I still like to "futureproof" my hardware if the cost is reasonable regardless. I did test a stock unit at the local Apple Store and I opened about 8-10 apps like mail, iTunes, iPhoto, iMovie, Safari, Finder, some QT videos I found on the computer, etc. With all of that open it seemed to run pretty well. Normally I don't have that many apps open at a time.