I am also thinking of going over to the software arranger set-up and have a few questions.

With any of the software arranger programs is it possible to create styles from scratch?
Are rootless chord recognized with any of the software arrangers?
Is it possible to use wave loops with the style and have the loops synch with the tempo changes of a style?
How easy is it to get access to the individual style tracks on the fly in a live situation i.e. adjusting volume muting or soloing a track.