Starkeeper,
Yamaha has just done this but those great voices come with a big price tag... The Tyros has the new "MegaVoices". I agree that it would make sense to really kick ass on some main voices like adding a sweet piano, sweet strings, sweet basses would be awsome, and other sweet and cool voices would work too... I too find that many of the sounds on my Yamaha won't ever get used.. I mean really think about it.. If you do jazz, rock, and classical, what in the world do you need all those sounds for.. Hell a basic rock band consists of a drummer, lead and back up guitar player, bass player, and sometimes keyboard players.. A song in that genere uses what..., basically 5 sounds.. Same with Jazz and Classical.. Jazz just takes a few instruments and hell sometimes just one. Classical takes quite a few but doesn't touch the synthy stuff. It would be cool if Yamaha just started included a MegaVoice set on their PSR line, and not have it that someone has to shell out thousands of dollars just to get the 10 megavoices they want....

Squeak