There is a site with Reviews, but not sure I trust it:
http://www.transportreviews.com/
I have personally used Intercity to move a model A from OH to NJ. The transport is great, the drivers are great, but be patient for scheduling. They say 2 weeks, but it is more like 4-6 in my experience.
I have also used a broker that used a dually with a small 2 car enclosed trailer. While everything worked out fine, I was more satisfied with the professional drivers at Intercity.
Just my opinion.
Matt