Even though I own a Holden and Mitsubishi I take my cars to Wippells for all their services. They aren't the cheapest service centre but my opinion is "You get what you pay for" and you certainly get 1st rate service at Wippells. They are thorough and always ask before going ahead with anything other than what was originally agreed to.
Once when I was buying a car, I suggested to salesman that I was thinking of buying a car just on the strength of the service workshop. This (Honda) salesman quickly said, "Well if that's the case, you had better go to Wippells!" We bought a Mazda and have been going to Wippells ever since!