Fran,
let me repeat what Frank said. Bandstand takes "ages" (5-20 seconds) to load all instruments when my keyboard sends program changes, and we are talking about drums, bass and 3 other instruments. (Styles in the Casio are 5 tracks).

When you try to load a midi file, it takes a lot more. I had to play the midi file, wait till it got to the program changes in the first (empty) measure , pause it, let it load and then continue playing to listen to it. Program changes within the song were even worse.

It sounds A LOT more "crisp" than Hypercanvas, especially if you play them head to head. It sounds equal or a little better than KeyRig GM that I think you already have.

On the other hand, electric guitars were a lot better in Hypercanvas.

Hypersonic 2 sounds as good as Bandstand in GM mode, and in synth mode will amaze you.
Don't rush.