Welcome to the San Diego area!
The best place I have found and can definetly recommend for Land Rover service is The Rover Group
owned by Jim Newmann. I have both my D-90 and RRC LWB serviced there and have had great experience with them. I do not know where in Oceanside you are, but they are only about 30 minutes away if you take the 5/805 South.
The Rover Group pretty much a one stop shop in that they handle any issue from just an oil change to complete expedition prep and engine swaps.
Again, welcome to north coast San Diego.