Hi, John --
I'm a bit late in noticing your post, but I'd like to respond to your initial query. It was because I studied classical piano for ten years and loved playing thereafter that I first suspected I had a neurological disease. Five years before my diagnosis I noticed that my coordination was imperfect. I started practicing finger exercises and found that I could not do the more complex ones. I practiced more -- no improvement. At that point I thought the problem might be neurological rather than muscular. But I had no Parkinsonian symptoms, so I was just left wondering.
When my handwriting started shrinking, my gait changed, I lost arm movement, etc., I was finally diagnosed. At first I delayed medication; but as the symptoms began to interfere with my daily living, I started on Mirapex (pramipexole). All of my symptoms disappeared! I could play the piano normally once again. Over the years, I have had to increase dosages and add new medications, but my playing is still good for a non-professional pianist. I can play Chopin waltzes, short Bach pieces, Schumann, Schubert, Debussy, and more. Mind you, I'm not of concert stage capability, just good enough to enjoy playing for friends occasionally and mostly for myself. So take heart and be assured that you probably have lots of musical time ahead of you!
Best wishes, J