Well, I heard that fantom is like xp-80 just has some new features,I played on fantom in store a little on Triton a lot, a little on Yamaha (don`t remember wether it was S90 or S09) but I think it is like motif, I din`t like Yamaha alot but i liked the tones,Fantom had very good piano sound, I don`t know if xp-80 has the same tone engine.The Triton for was very easy to use unlike Fantom or Yamaha S90/S09.Fantom`s arpegiator was more like for funk or dance.