arbrandes, my go to auto accompaniment player is Live-Styler. In fact, I purchased the complete system including thousands of styles and sounds (giga and soundfont). Ableton Live turns out to be a very good host. It takes a bit of effort to get it all setup.

Rikki, I gave up on forte so I could use a much higher quality vocal harmonizer, namely Antares' Harmony EFX.

At this point I have not used any of the Ketron stuff with vArranger. This will be a future undertaking.

Frank