I'm retiring an old piece of my commuter luggage. It's time for something good. I'm looking into getting a backpack/pannier combo for hauling my books and miscellany to school and back, as well as moving clothing and groceries from here to there. All of this needs to happen whether it's raining or not, so weatherproofiness is essential. I'm also using some Axiom Stormfronts for that kind of stuff. Mostly I need this bag to fill my need to hold my school stuff both on the bike and off.

Here's what I'm looking at:

• Ortlieb Vario, $108, holds 20L
• Aquapac, $70, holds 23L
• Arkel Bug, $160, holds 25L

Anyone have thoughts on these bags or know of any other good options that I'm missing?