Hi Scott

On the Karma, when an arranger-style combi is selected, you play chords, it provides harmonically correct autoaccompaniment. As you suggest, I find the Karma's autoaccompaniment styles "exciting".

The Karma has the same sounds and sound-expansion options (except no sampling) as the Triton. Overall, the sound is fine, but I find the piano to be a weak point--as you suggested. (I have not hear the PA-80--its sound set is derived from the Triton, but it is not the same.) Possibly, the piano on the keyboards EXB card would be an improvement. I have not heard it.