Hey guys, I'm trying to decide if I should get a 4GB or 8GB model. I can get the 4GB model at Bestbuy for $799 before tax, while the 8GB has to be ordered from Apple and it would run about about $1000 before tax. I don't do anything like video editing on my laptop. Just need something to take notes, browse the web and run text editor software. I don't know if 4GB is enough, since my friend has a 4GB Air and the RAM seems to be maxed out in Activity Monitor and swap file was used. Would that indicate that the computer doesn't have enough memory? If anyone who's already been using the 4GB model for a while, I'd love to hear your opinions.