I've used Springle Transport Service (
www.stscars.com) and it was a great experience. The driver took great care of my car. It was on the lower level of an enclosed carrier, and he put a cover over it just in case the car above it started leaking any fluids. All he had in the trailer were high end new and classic cars. In fact, I think my car was the cheapest thing he had. The driver even gave me his cell number so I could call and check up on his progress. Highly recommended.