Nothing matches the sound, touch and feel of a real piano. But there are occasions where a pianist does not have a real piano at his or her disposal. On these occasions, the common substitute instrument is a digital piano . These vary drastically in quality, just as real pianos do. Now and again I'll post entries here on my blog promoting the most outstanding models I've recently played. I hope this proves especially useful to readers who are in the market for a digital piano. Yamaha YDP-223 On 8/30/09 I played for a wedding at St. Victor's church in San Jose . The keyboard instrument at the church, a Yamaha YDP-223 , was surprisingly excellent. The touch and response were great and the piano sound was truly outstanding. I didn't check out any of the other sounds and functions of the keyboard -- I was strictly interested in the piano sound for the music I performed that day. The Yamaha YDP-223's current list price is $1,600. Yamaha CLP-123 From August-October '0...