True touring bike = longer wheelbase + slacker angles + stiffer tubeset -----> All the better to safely carry significant front and rear loads.
Cyclocross = geometry not too different from a roadie + a little higher BB + canti-posts (although discs are coming up fast).
Dunno know about you, but I don't need to carry significant front and rear loads, and opted for a cyclocross rig (Gunnar Crosshairs) for my commuter. Marginally more sluggish in handling than my better road rigs, but I'm running rear racks, with a cargo bag and weatherproof panniers, fenders, dyno hub, and 32x700 tires. All that carp would make most any rig a less lively.
If you are looking at a Surly Cross Check, you should also check Soma Double Cross. They even have a newer version for discs brakes, which is a nice option if you are running all weather. Higher up the food chain is the Gunnar Crosshairs, although I'm on mine simply because I found a really sweet deal on a used one. Nice frame though. For a relatively modest upcharge, Gunnar will make you one to measure. Stock or custom, they are made in Waterford, WI, by a company run by Richard Schwinn, (yes, related to that family) which I think is pretty cool.