I'd have to agree (and my soon-to-be-proposed bard character does as well) - there are actually few areas of human endeavour which so elevate the work of a master crafter as much as music. And while they sound the same in the hands of an amateur, there's a big difference between a Yamaha student model and a Stradavarius, for the violinists and cellists, or Bogendorfer for the pianists, and so forth.
Edit:
As an afterthought, that would be a neat way for high-level instrument crafters to make a name for themselves... in NWN2, having read the documentation. Barring use of Letoscript to generate a spectacular number of instruments, there's no way to rename items. In NWN2, though, they've promised dynamic item names, so a masterwork instrument could very well have a character's name attached to it, just as they are known in real life.