Diki,
Yes I have heard the rate is several hundred per style. But also, there are some third party's that make them and sell for more like $10.00. But are they like factory quality? Subjective.

Wersi was smart...just license to use the Yamaha styles and provide the engine to play them directly. How do they work/sound?

Dennis,
I'll be anxious to hear how the XG set works/sounds.

Dom,
Hey man...just send CD's out for the sound set. Won't cost that much. Quality assured.

Lee S.