Hi, I'm hoping to get some advice from the experts here as this will be my first macbook air. I was looking forward to get a new macbook air, but then a friend offered to sell me his for $800. It is the 11" 1.6ghz/4gb/128gb model, and he is willing to sell it for $800. Is that a good deal, or do you think I should just get a new one. I've been happy with my Core 2 Duo computers, so I don't know how much power I actually need, although more speed never hurts. I also don't want to spend on something that would be considered obsolete right away. What do you think? Go with the older model or the newer one? Thanks so much!