Just looking at the panel layout of the new S550..., It's possible the sequencer is now 16 track. If you look at the part/registration buttons you'll see half are 1-8 and the other half is 9-16.... Also take note to the top right of the screen and you'll see the words "style creator". Is it possible they finally brought style recording back to the lower end..?? Interesting that they're popping this model out already. I wonder how much more it will cost than the S-500 and how different the specs will be.