Looking for a backpack

So, I'm looking to replace my current laptop backpack by ful because of rain. I carry my laptop to class everyday and since my campus is outside, as well as parking being a good distance from class, I'm constantly afraid of getting my laptop wet.

Anyone know of any bags that have a laptop compartment that are water resistant?

I've also heard about some stuff thats spray on to make something water resistant. Is that stuff any good? I don't need something that can survive Katrina, I just don't want to be worried about my laptop getting wet walking 100-200 feet in the rain to get to the truck.

 

I have a Swiss Gear backpack and a Swiss Gear satchel and I love them. Really well made and look good. Have good compartments for my laptop and other crap.

 

All of the OGIO backpacks & bags are awesome we have several.

 

i have a swiss gear back pack. cost about $40. It is great. Very strong.
Swiss Gear pack

It is also airport ScanSmart so you don't have to take it out when you go through screening at the airport.