this may just be my personal taste, but i think this would be a really great shot if it was a little more in focus in the front. lots of texture, color, funky symmetry going on here.
Nice shot and good use of a short depth of field but I think you could have benifited with just a tad more. I'd have liked to see all of the...er...tuning pin thingy's be in focus.
You will probably suffer from the same effect as me - people won't see connection to "Good" in it. Maybe if the subject was fully visibe, it would've help. In this picture the focus is on the string. I would think it is more about "well tuned" than "good piece of a luthier art". I have no idea what kind of instrument it is, but I can understand your idea.