I guess if you are never going to take your instrument out of the livingroom, than maybe the Clavinova Piano (CVP) is the way to go. If you want portability, then a Tyros or PSR with a good piano module is the way to go.
When I first got my Acoustic Piano plugin card, I thought I wasn't impressed with it, but after playing it for awhile, then I played my PSR S910 Grand Piano solo, and was astounded by the poor quality of it. The PSR pianos sound fine in a mix on a song file, but leave much to be desired as a solo instrument.
I would be surprised if I ever part with my PLG150-AP card, it's a bargain at $250.00.