OP, you may want to consider taking a look at this thread that was started a few days ago (see link below). Lots of good recommendations; it has also led to me doing further research after looking into some of the other bags mentioned.
http://www.bikeforums.net/commuting/...ling-work.html
Last edited by Seano Hermano; 07-22-14 at 07:13 PM.