Paul's dashboard

I'm retiring my current generic messenger bag and upgrading to a Timbuk2, but can't decide between the Blogger & Commute since I can't see both in person (not in SF). Can anyone provide input?

On the worst days - heavy snow days - my bag needs to carry my 13" MacBook and power brick, a pair of shoes, and my lunch... which'll be a few small things: sandwich, stuff like that... along with all the usual things I carry, like 3 li'l Moleskines, a small camera, a book, etc. It looks like the medium Commute can handle this, but I'm not sure about the Blogger.

As a bonus round question: can the outside water bottle pocket on either bag manage a 27oz Klean Kanteen? That's a real make-or-break for me.

Much obliged!