Hi all, a bit of advice needed here. I have a late 2007 MacBook (plastic) which is too heavy for me to carry around at the moment, and as the new MB Airs are very tempting, I think I might go for one of them. I'm wondering if 1.86GHz would be enough for me (I probably could afford the 2.13, but I'm going to save money where I can!), considering I would be doing the following things: Internet browsing, Mail, iWork docs, streaming from another iTunes library, Adium, Skype, etc. Nothing too intensive, just a bit of college work. My current 2.2GHz has been fine, and I think I'd upgrade to the 4GB RAM too (that's also what I have at the moment). Normally I'd have 4-5 of the above going at once - so is 1.86GHz enough? Many thanks for all help, it is very much appreciated!