Gary, I have a CVP 307, when I purchased it I pretty much played it as an arranger and a piano. But now with a Pa2xPro and an S900 I rarely play the the Clav as an arranger but play it as a piano. Up until 4 years ago I owned a Samick grand that required tuning and servicing at least twice a year when it was tuned and service it was a pleasure to play. But with New England humidity and changes of seasons sometimes it didn't sound so good. I eventually sold it to buy the CVP 307 and don't really miss the Samick. Never goes out of tune or requires service. When I play it as a piano I usually use the "Grand Piano 2" setting, it's reminiscent of what I remember Steinways to sound like. Of course it's been 30 plus years since I worked for the Steinway dealer and had the opportunity to play them daily so my memory may giving me false info
You may want to head over to cvpug.com the Clavinova User Group.