The World According to Gio

Talk to me people. I am apparently going on an emergency business trip to Europe for the day job within the next couple of week (going to finalize details today) and since they'll be paying for my flight, I'll probably tag on a couple of weeks in Europe at the end as a small means of compensation for going somewhere I do not wish to go. I can't actually abandon some of the pending Casperian titles that long, I'm contemplating the purchase of a laptop. I *was* just going to go with an ordinary Mac Book, but now I'm eyeing the MacBook Air, since I'll have to lug around the Work laptop as well... but then I'm looking back at the standard MacBook having a larger HD (not to mention the $600 price delta) and, um, well a lot of what I need to do involves large file wrangling...so, opinions? Suggestions?