Currently doing the backpack for carrying the college texts and stuff. Not a problem for now because I'm using the bus instead of the bike. My schedule will allow me to ride 2 days a week when it warms up.

When I do start riding again, I want that weight off of my back. Doesn't need to be waterproof, but does need to be durable enough to hold up to the weight of my Philosophy text, 2 half inch binders, and other items. Currently carry a not so lightweigh laptop (7.7 lbs w/o cord), but not planning on carrying that when I ride. The panniers also need to be easy to install/remove.

Any suggestions?

P.S.- I don't want this to turn into a "weight on your back vs weight on your bike" debate...