Revoltingly impressive !! The problem with you Don is that no matter whether you play a Korg PA3X of a 200 dollar Casio I get the urge to rush to the shops and get that very model !!! Just goes to show you are a very gifted musician, and that my friend you are.
Incidentally, I would guess this is indeed an Audya and not an SD5, at least I would be surprised if it were......

regards,
John