Of all the boards I've played with, the Session board is the most versatile. I haven't found a better JV/SR piano that the Session's stereo grand, and most of its waveforms are greatly superior to those in the stock JV banks of my XP-30.
In fact, the only board I like more than the Session board is my Country board, which has a great selection of acoustic/folk instruments and a better variety of country and blues guitars.
Jeff