Help me choose a bag for traveling!

I've recently become interested in a messenger bag for my gadgets when I go to school or just travel. I've gone searching for the perfect one, but some are either too expensive or are just plain ugly. I want one that can carry my iPad, Macbook Air, maybe even an iPad mini in the future, and one or two books. I'd prefer a classy looking one, and for it to be under $100 (if that's even possible).

If you guys can link me or show me pictures of some nice looking, comfortable, lightweight bags, I'd be extremely thankful!