I have to confess, chas... the piano stuff you have heard is totally bog stock standard. No EQ, no compression (except for mastering afterwards, and that's the whole mix), no tone edits..!
I just happen to feel Roland got it just about perfect with the G70. From what you and several others have said, I get the feeling you agree

The thing is... try to record yourself and listen afterwards. Evaluating while you actually play is kind of tough, you are trying to do two things at the same time. You may find yourself liking it a bit more on playback than you do on record
