I have never played one, but have heard some Clavinovas, and they are very impressive. My impression is that Yamaha does not hold back, when making these, but they are VERY expensive.
On this forum we argue about which piano voice on a Yamaha, Roland, etc. we prefer and say is subjective. But only a Clavinova (or the Roland equivalent) sounds like a real piano.
Let the flames begin.
Starkeeper