A little OT but my biggest issue with the PA600 (besides many bugs reported on korgforums) is that they eliminated some of the chord recognition modes, including Fingered 3. This was a HUGE mistake. The cheap little microarranger actually has more flexible chord recognition than the PA600. If I owned a PA50 or PA500 there's no way I would upgrade. Chord recognition is the defining characteristic, the sine qua non of an arranger. Hopefully they will rectify their mistake in a forthcoming OS update. Otherwise I won't care if those boards go directly from inventory to a landfill. It infuriates me when manufacturers do this kind of stuff. Grr...!