How do you guys feel about Timbuk2 bags? I used to have one when I was younger, and it was pretty much the best thing ever. I was thinking of getting their double pannier bag because it is just so nice...you can take it off and carry it like a shoulder bag! For those of you who ride for errands and whatnot, what is your favorite personal bag to carry when riding? I want to get another Timbuk2 messenger bag, but I don't really know my options.