Hm. . . .
Greg's Japanese Auto is a well know mechanics and I think they are pretty trustworthy. If they couldn't work on your rig they probably could refer you.
I'm up in Kenmore at the north end of Lake Washington. We use Advanced European Service down the street from us. I talked to the owner, they specialize in European cars but they can handle most makes and models. I see them working on Corvettes and Acuras from time to time. I'm very comfortable with them working on my cars and trust them.
Undoubtedly there are other good mechanics in Seattle, I'm just not that familiar with them.