I have been to Europe a lot and done the self tour, local guide, and organized tour. I gotta say I have enjoyed our experience with Gate 1 Travel the best. Not having to worry about transportation or accommodations makes for a relaxing trip. A very good way to get introduced to a new country IMO. You could probably hire local city guides through them as well. Worth a look.
Paris Vacation Packages, France Tours, France Vacation Packages - www.gate1travel.com