bt93, thank you for saying what I was going to say. Sierra Trading Post is awesome if you want a Timbuk2 bag. I have two and love them so much. I will try another bag for a while then go right back to my Timbuk2. They hold plenty and is easy to find everything in it. I have an Xtracyle
so I can carry whatever I want, but for short distance errands on the way home the messanger is great for keeping on my back then jumping off the bike, swinging the bag around grab whatever I need. I use it daily.
Good luck