Alex,
I will go against the grain here and give you a counter opinion.
I think he Verita is a great commuting bike and one of my favorite Novara models. It will accommodate 28c tires with fenders just fine which works well for commuting most places. For 1-3 day light tours (similar to light backpacking) loads it would work fine as well. Handling is more nimble than the Randonee, makes it a lot more fun to ride when you are not carrying a touring load and it handles fine with moderate loads. If you load it down with heavy touring loads the handling would not be so good and you would want wider tires at that point.
The Long Haul Trucker has a cult legendary status, and it is a great long distance touring bike, but heavy with 'ponderous' handling. Great for the person who wants to do long tours with all of the comforts (think traditional backpacker) but not much fun to ride unloaded in my opinion. It is not so much that it is actually slower, but because of the heavy frame and long wheelbase it feels slow.
I would prefer something lighter and more nimble for both touring and especially for commuting, but keep in mind I often commute on a road racing bike when the weather is good. :)
As for steel as a frame material, not absolutely necessary for touring, but I prefer the ride of steel frames over most other materials myself for any kind of bike. Titanium can be nice as well, but will certainly be far more expensive.
Feel free to PM if you have more questions. I have worked in the bike industry for over 30 years and currently work at the Clackamas (#102) REI as a Sales Lead and CE trainer.