Dennis... seems we need to talk to Roland BAD... There are FOUR buttons there just BEGGING to be used as four Markers in SMF mode. Just like the G70/E80.
Coincidence? I think NOT!
They already have the code. All it needs is slotting into the OS.
Next BIG thing is some rudimentary tempo mapping on .wav's and mp3's, so the same thing could be done with audio files, too. That might also allow for simultaneous arranger/SMF and audio file use, too.
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An arranger is just a tool. What matters is what you build with it..!