I commute at least 3 times a week with a laptop. I'm planning on getting an Ortlieb pannier for clothing items and such.

What I need is an absolute waterproof pannier for my laptop that is designed to carry the laptop. The laptop is my academic life and I can not afford to lose it to water damage as I probably couldn't afford to replace it. Any thoughts?

I know the chances of me riding in bad weather are slim, but I don't want to take the chances of getting it wet.

flyingcadet