I don't know... I can't play more than one at a time and they take up a lot of space! If I had more money and more space and no wife maybe I'd end up collecting, but as it is I guess I'm monogamous. And having one at home gives me an excuse to go out and play around town and get excited when I discover something in the wild that I really enjoy. Owning one beautiful machine seems like a healthy indulgence, good for parties, and perfect for honing skills, but having a collection seems like more of a career than a hobby. It's like how some of the best cooks I know say they would never want to open a restaurant because that would ruin the pleasure of cooking for them.