I forgot to mention that your recording sounds amazing. I did enjoy the Korg PA900 a lot and the VH is outstanding.
I am getting into the SD7 more each day and have the VH sounding very good. Awaiting updates that should take the programming a little deeper.
Be warned that to make the Korg, or any vocal harmonizer sound that good, you have to have a voice as great as Dave's, and that is a very rare thing!