While the PA80 might not be the easiest of the arrangers to use in a live act where you might want to do a song by request
( solo act would be more accurate ), it certainly will work well in that capacity. It helps to have your memory regisrations set up in advance ( Called performances in Korg's world ) The PA80 will include sampling too in the next OS.
The PA80 has 4 audio outputs. Yes you can map different drum parts to different outputs according to the manual. I haven't tried it though. I would think that this would include a metronome click as well, but I'd have to try it to be sure Boss. Andrea Bernardelli is one of the Techs / designers of the boards at korg. He always responds to questions that I've had and also posts regularly on the PA80 forum at yamaha groups as well. Here is his email adress: bernardelli@korg.it
I'm sure he'll answer the question about sending out the drum click accurately for you.
The PA80 isnt quite a Motif or Triton, but as I've said before, I think it has bridged the gap quite a bit between arranger and workstation and offers similar synth editing features and excellent sounds.
AJ
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AJ