I have joined this user group to get to know Kurzweil keyboards and share information. I bought a used K2661 online (ebay) last year (6 moths ago). After spending some time with it, I really liked it. But after doing some research online decided PC3K6 might be better in the long run. So I sold my K2661 recently to get a PC3K6 instead. I am looking to buy a used PC3K6 from original owners.