My PRIMARY question for the Audya...?
The guitar audio loops. What chords do they voice correctly, what ones do they NOT (or ignore), and are they the same for each style?
Please SOLO the loop track and check this out for me, please.
Do they do aug chords? Do they do min(maj7th)? Do they do 6ths? 6/9ths? 7#9ths? Inversions?
How quickly and glitch-free do they respond to rapid chord changes?
This feature alone is the major difference between the Audya and most other arrangers. Hence it is the reason for the huge increase in price (presuming it IS a lot more than the SD-1). How well it works, and how much variety it can provide (do ALL the styles have guitar loops, or just a few?) will make a big difference in how the Audya does, IMO...
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An arranger is just a tool. What matters is what you build with it..!