Isnt commuting a lot of fun? I love it too because you are right, it starts your day off just right!

For all my work stuff (and I have a lot I have to bring home each night) I use Ortlieb Classic Panniers. Waterproof and very high quality. Thetouringstore.com is the best place (in my opinion) that sells them. Call up Wayne, the owner, and talk with him. Real nice guy!