Road Bike as Commuter Bike?

[amandar]

What sort of touring are you talking about and how much weight are you planning on carrying?
I love my Salsa Casseroll, it serves as my road bike, commuting bike, and light tourer (loads under 20 pounds)
You'll want to keep in mind what the roads are like around you. The roads where I live are terrible, so my commute bike needs to be able to run at least a 700x28 tire. You also need wider tires for touring.

Does your current bike have fender and rack mounts? A lot of modern road bikes don't.
Fender mounts are a plus, but not a necessity, race blade fenders along with waterproof shoes work fine for me.
The same for rack mounts, you can get by with a roomy saddlebag or seatpost rack.