Hi, I am a proud owner of an iMac, which I love. This replaced an old MacBook that came to the end of its life after a good five years faithful service. I am about to start a PhD, and need to get a laptop - I have become somewhat obsessed with the MacBook Air, but think I may be in lust rather than love, and wanted some advice. Is it style over substance? I expect to be carrying it round with me at least 4 days a week, so size and weight are important. Maybe a pro or even a macbook will be better options. I will be using lots of programs at once - statistics packages, various office programs, bit of desk top publishing, internet browser etc but won't be doing much gaming. I don't envisage needing a CD/DVD in the library, or needing USB for anything other than my iPhone while out - is that stupid of me? I want a nice machine with a decent screen, that will last at least three years, isn't likely to loose my thesis and isn't going to break my back lugging it on the tube everyday - oh, and one that makes everyone with a crappy looking PC laptop feel jealous too of course! What would you get? Also, does anyone have a time machine thingy? Is it worth it? Am thinking about thesis, making sure its backed up - I have an external hard drive and airport already, but I like the wireless functionality of the time machine. And finally, can anyone - other than customs officials of course - think of a reason why I shouldn't get the computer from the states -either myself or a friend bringing it over - which works out at about £300 ($500) cheaper?