I've always had good expirences with AmD, but when I used a dealer they did a decent enough job.
Ultimately, for major service, can follower and even oil pick up, I'd strongly recommend getting on YouTube and a Haynes manual and doing it yourself. Save loads of cash and learn more about your car, which stops garages ripping you off.
Following on from richtung's comment, I do a lot of work myself because then I know exactly what's been fitted and that proper methods are followed.