When I first bought my 17 inch behemoth from Dell, I had to buy a laptop bag that was more like a hiking bag. Most people were surprised by my choice since they preferred the smaller laptop bags. But it wasnt just the weight of my Dell 9300 that would break a single shoulder, I also wanted something to set me apart from the rest.
Its a pity I didnt get something like the Built laptop backpack. It sticks close to the body and looks more like an ergonomic bulletproof shield of some sort rather than a laptop carry bag. It can certainly carry my 17 inch Dell and even has hidden compartments to help carry accessories. At USD 80$ , its a beauty to take to B-school.