Interruptor levers can be installed on any bike, so I would not limit yourself to bikes with cross-top levers pre-installed. I find for a commuter that they are not that useful, and get in the way of the other things that are nice to have in the handlebars (lights, computer, etc.).

I have two cross bikes and a touring bike that I commute on - I would definitely add the Kona and Surly offerings to your list, although most people already know about those. Soma, Gunnar, Rock Lobster, All-City, and many others make nice cross offerings. Marinoni as well, as you are in Canada. If you are buying a cross bike to use as a commuter, make sure that it also has seat stay and fork eyelets in addition to eyelets on the rear dropouts. You'll want fenders on that thing.