I am looking to buy a 15" SR MBP over the next couple of weeks. Planning to lug it around to university for a couple of years. No problem you'll say. My problem is that I am in a wheelchair, and the mbp will have to ride in a backpack that rests against the back of my chair. That means it'll feel every curb that I do, and all uneven pavement as well. How careful will I have to be with a mbp? Does it bend or dent easily? My previous laptop was a cheap acer, the plastic casing of which neatly ripped after a few months. How can I best protect the mbp in this situation? And how easy-going is apple with applecare? I'm a bit nervous about this, considering previous experience.