Hi Scott

I think the E500OR is the "Oriental" version of the E500. While I am not sure that it is top of the line, Roland does use the terms "flagship" and "professional" to describe it, so it might be more than mid-line.

While the Triton does not have arranger functions, the new Korg "professional arranger" PA-80 will have a Triton sound engine. I think you will want to review this new contender for ScottYee compliance (rootless pianist chords).