If you are looking for a killer acoustic piano for your Triton, this one might be worth looking at (it's a simple and cheap job to add 64MB RAM and a SCSI port and ZIP...)
http://www.ksounds.com/html/piano_21.html Very warm and detailed, MUCH better than the Korg Piano board...
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An arranger is just a tool. What matters is what you build with it..!