The Yam S80,S90, p120 was the big fight with me trying to make a decision on which k-board to purchase. I love them all. the S90s n 80s are the little brothers of the motif ..they have wonderful sounds u would love if u like. You can do alot with the S90, record..and I think this is the one has the disk..it has the sliders, wheels, nice pianos, organs, guitars, strings, etc,,,etc..so much u can do with this board. The big brother Motif is the big daddy..to me..if u r pro..thats the way to go. I did alot of sweating to make a decision..i ended up getting the p120...i wish i had of gotten the S90..cause it has many sounds. I am looking for a nice ES or something.,, hope this helps. They are heavy boards. But you have to get out there and try and feel them out..its a personal thing in comparision. :wink: