I'm looking to sell my MacBook 2.0GHz in favour of a rev A refurb MBA and a desktop machine. I was wondering how the performance would compare between the 1.6 and 2.0 processors. I heard some pretty nasty things about how I won't even be able to play YouTube videos on it, but I tried out the Rev A at the Apple Store and it seemed fine. What type of performance hits would I expect going to the Rev A 1.6/HDD MacBook Air? I will be doing browing, iTunes, Adium, Youtube, word processing, and maybe some light photoshopping. Like I said, I plan to build a desktop machine as well. PS. Scottsdale, please do not try convincing me to spend an extra $1500 to go with the Rev.B 1.8/SSD. I really don't want to spend more than $1100 on it, as the desktop machine I am planning to build should run me another $1000.