A word to the wise (and to you too, if you want -- i'm hardly picky). 15" is WAY TOO FREAKING BIG. No matter what the dude at Future Shop says between accosting you in the aisle and force-feeding you a service plan, you do not need that much monitor sitting on your lap.

Also, in my experience, laptop batteries never last long enough. For long trips, you may want to invest in a spare.