I'm a college student studying computer science in Los Angeles (GO Trojans!). I have an IBM Thinkpad X40 on the way, so I'll be ordering a Brain Cell Size 5 very soon. My current conflict in choice is between the ID and the Empire. Along with the Brain Cell, a 3/2-inch textbook will be carried, as well as a few loose-leaf notebooks. I'm looking for the lightest, most portable solution. Will the ID accommadate my intended inventory, or will I have to look towards the Empire?