What are you experiences? What should one look out for in choosing an auto transporter?

The more and more I look at it, it seems like it will be cheaper to ship a car from the South/Cali here to New Jersey than it would be to fly out and drive it back. So I am exploring options. =)

From what I have read apparently going via train is almost not an option, one site I read says that it only goes from Florida up and down the coast and you have to train with your vehicle (odd).

Anyway feel free to share your experiences!

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'87 300TD Estate (Panzer Wagon, Sold)
'95 E320 Estate (Sabertooth, Sold)
'94 E500 (Stark 1, For Sale)
'04 VW GTI (Rhino, Sold)
'12 VW GTI Autobahn (Shadow)