John,
It is much to soon for me to comment with any credibility on the sounds, and styles because out of the box the BK-9 is nearly useless for what I do and the audiences I perform for. I need a bit more time with the keyboard to give it a fair appraisal. I expect sometime in the upcoming week I will write a full review and post it both here and on the Roland-Arranger site.

Deane