I, too, live in Canada and stress over my online purchases so that once I've converted to CAD, added shipping and customs fees, that my bank account isn't left crying.
I have an A30 as my main travel bag and absolutely love it. I'm just concerned that you'll find it cumbersome and uncomfortable as a commuter bag, when you have a laptop in a sleeve kind of floating around in the main compartment. The vertical organization of the Synapse or Synik bags might suit that purpose better.