Hello all, I'm currently applying to grad school, and I'm looking to upgrade my laptop. I own a black 2006 2.0 Ghz Core Duo Macbook. I have upgraded the memory to 2 GB, bought a new 3rd party battery, upgraded the HDD to 160 GB, and bought a 500 GB external HDD. For my needs - writing, web surfing, listening to music, streaming movies, backing up/updating my iPhone 4 - it works perfectly well. The only issue I have with it is that it overheats and crashes really easily. I'm going to be starting classes in May, and the idea of lugging it around and keeping it running over the summer, and for the next three years, sounds daunting. I had been considering buying an iPad to use in class. It would do everything I want really well, but the lack of a keyboard and the reliance on my not-especially-long-for-this-world macbook are big negatives. Maybe tomorrow's iPad announcement will sway me, but I don't see it solving either of those issues. So, I'm considering selling my macbook and picking up a refurbished macbook air 11". Generally, I've read really good things about it. I'm hoping to get around $500 for my computer on Craigslist, and the refurbished 11" is only $850. I'm pretty much broke right now, so I'm not sure whether I'd be able to spring for any upgrades. I don't have any problem with screen size (I was planning to get an iPad anyway), and I should be able to work around the 64 GB limit with limited shuffling to the external HDD. Right now I'm taking up about 100GB in my macbook, but a lot of that is old movies and TV shows, and files that roommates have dumped on my machine. Basically, all that I'm worried about is that the processor is too slow and that 2GB of ram will become an issue with Lion. Everymac shows that the Geekbench score for my current computer is 2460, and for the base 11" air it's 2028. I don't know if that will be noticeable or become an issue. Also, I've heard that Lion is a memory hog, and 2GB sounds a lot smaller when there's no option to upgrade. My other option is to buy a white 2010 macbook (Geekbench 3365). On paper it looks better in every way, but reviews all agree that the air is deceptively fast. What do you guys think?