Going to a bike that deals in commuter bikes is the way to go. Personally, I commute daily on my touring bike, tho if I were just getting into it, I'd want something lighter, maybe like the Handsome Devil. But go into a shop and let them help you find one that'll fit your needs and your body. You'll likely spend a bit more money than getting from a bike company that sells consumer-direct, but the value of being able to try the bike and have someone listen to your needs and make recommendations, answering all your questions, not to mention creating a relationship with the people who are going to be doing your service, is worth the few more dollars you may end up paying. You'll end up with a bike that's better for you personally in any case.