We connected with the Jerusalem DC Tour through Abe (Concierge at the Hilton in Washington).
We were very impressed with our guide who had a PhD in Archaeology and a wonderful narrative of the area that brought it to life for a group of Australian tourists.
There would be no way that we could have seen and learned so much in four hours without the tour. It was highly informative and really enjoyable. In my opinion it was far superior than just taking a hop-on bus route.