I have a couple of the Randonneur racks and find them to be really a neat deal. This new Sherpack bag that goes to 22 liters look pretty attractive for high speed/low profile commuting. I currently have a full rack on the back of my cross bike that I take on and off all the time but I this might make a great alternative.

You know you could take your current pack to a good luggage repair place and I'm sure they'd be able to easily add a handle like that. I've done things like that before and had great luck with it.

J.