Needed: Travel Pack

I’m looking for a good recommendation on a travel bag/backpack. I’m currently using a Timbuk2 messenger bag and a monster of a bag that my company issues along with your laptop. Problem is, neither of the bags work for a day trip. One is too small and the other is too large. I need a good bag in between the two in size. So if anyone out there has a reco on a good backpack style bag with a laptop area, let me know.

P.S. - And none of the wheel bags. I like to carry the bag myself.

Update: I’ve decided on another Timbuk2 bag. The Blogger has exceeded my expectations for fit and functionality.