With all the heated battles about messenger style bags, this seems like the best place to ask.

I'm buying a Timbuk2 online, and I was wondering if someone can suggest a size. Here's what it needs to haul dailY:

3 full-size textbooks
3 1" binders
6x10x2 tupperware
pair of jeans
t-shirt or sweatshirt
shoes
Kryptonite U-Lock
Nalgene

And when I get to school, I'm trading the jeans and t-shirt for a helmet stuffed in there.

I busted out my tape measure and it looks like large is the way to go, but I wish they had more pics of the bags filled with stuff.