Hello, I have a 13" MBP and I am going into high school next year and am going to be taking my computer around a lot more than I do now. So I need a backpack or book bag styled case. It needs to be able to carry, my computer in a sleeve, at least two binders, 2 classes worth of textbooks (I don't know how much that will be yet ), pencil case, and have room for a few knick knacks. Do you know of any that look good, are durable and water proof, and will fit ALL that stuff in it? If you do, please tell me.