This is just my opinion, of course, but I've found that the very best (as in "full", "thick", etc.) piano sounds are not usually the ones that sound best in a mix or arrangement. They tend to require more "headroom" in the mix bus (ie. higher bit count) or they will start to sound "muddy". For solo piano, I tend to use the Motif ES or Triton w/Piano board. Neither is a standout but are probably better than what you'll get in the average arranger kb. Although nice to have, I can't imagine anyone choosing a 61 key arranger keyboard for a solo piano presentation; midi file playback of a piano performance maybe, but there are cheaper ways of doing that. I'm just saying that of all the voices on an ARRANGER keyboard, solo piano is the one least likely to be a deal-breaker for me. What is more important, to ME, is how well they blend with the other voices in the average arrangement. The piano voices on my G1000 are lousy (IMO) but sound just fine when used with most of the styles or in midi playback, especially with SMF. Bottom line, if you're playing out, no one is going to know the difference; if you're in the studio, you should be using something like GigaSamples or better yet, a real piano.

chas
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"Faith means not wanting to know what is true." [Nietzsche]