I'd consider Red Oxx if I could see them in person first, but alas no. One of my reasons I love Timbuk2 is that they're "local" for me.
I checked out the XS Classic Messenger - too small. Only might hold a *little* more than my Jack Spade bag. However, when I looked at the Small I started to think if I was gonna use something that big why not just take my full-size messenger bag? The only reason I had thrown out the idea of using it was that I am not taking a laptop on this trip, and I was going to do what I do on trips where I *do* take a laptop - pack my Jack Spade bag for when I'm just out and about.
I might still go for the XS messenger, but I can't really decide. It seems kinda heavy for what I'm planning on taking. I should probably lay things out for a test packing first...