Jim,the Key Rig piano has good tone, it lacks some dynamics as the hardware Stage Piano from M-Audio..You can layer the acoustics and this does help..
The best softsynth acoustic piano I have is Roland/Edirol Super Quartet piano. It is a little better than my HyperCanvas piano..

Frank, I am not getting rid of the G1000...If I decide someday not to use the sounds[doubtfull], it will still be a great controller for me.