I have the Thule case as well. It works fine, and a decent buy for the money. Better cases cost a fair bit more. However, airlines will charge you an extra $50 - $100 each way, plus you'll need to rent a mini van or larger car.
A better option might be to have your LBS box it and ship via UPS/FedEx. I know some shops in CA will accept bikes and build them up for you for a small fee. Overall still maybe cheaper then buying a case and paying the airline.
Also look into renting. I know Nytro will rent Cervelo's in SoCal. You can still take you seat, etc... But you'll get good service, and the LBS might have some tips for riding in the area.