I'm trying to decide between the following commuter backpacks. Anyone have feedback or experience with these?

1. Ortlieb Velocity
http://www.rei.com/product/768101?cm...:referralID=NA

2. Timbuk2 Lex
http://www.rei.com/product/782785?cm...:referralID=NA

3. Banjo Brothers
http://www.banjobrothers.com/products/01150.php