The cheapest would be for you to drive it yourself. Other than that I just used these guy's to ship my car from California all the way to Jax, florida, they pick it up on time and drop it before the original ETA.
Specialty Mobile System:
service@autotransportspecialty.com
You should also check this web site, it's pretty clear who are the best in the business.
http://www.transportreviews.com/
This is my car:
Hope this helps