The "best arranger styles", in my opinion, are the ones that work best for the user's playing style and needs.

I'm not a fan of Yamaha's audio drum based styles, although admittedly, they sound pretty good. They fall down, unfortunately, in the editing department.

I'm also not very fond of the posted (and earlier) Audya styles either, but it's more of a case of preferring a smoother sounding style.

Yamaha's styles appeal to my ears, not just because they are more fluid sounding than the competition (yet still possess lots of detail) but there is a vast database of styles to use as donor styles when making one's own personal accompaniments.

I prefer to put my own stamp on a tune, so song based styles have limited appeal to me, and, although I always use styles when I play/record, I don't use them to color my songs.

I create songs by using styles...they're an essential part of what I do...to me, they're part of the art.

Ian