Intercity lines is easily one of the best out there. They own all of their trucks and the drivers are all company employees. I can't recommend them highly enough.
I've also gone the single car transport route when Intercity didn't have any availability and was very pleased with that as well. The guy I used is based on the West coast, though.
'12 Alpina B7 Alpina Blue/Black
'11 1M Coupe Alpine White
'11 M3 Coupe Silverstone/Black (sold)
'08 M6 Coupe Stratus/Black
'03 M5 Sedan Imola Red/Black (sold)