Wait a second, I think I came across something significant.

The S910 specs do not specify what kind of new voices there are, but look at the total:

S900 = 891
S900 = 1186

If many of these 295 new voices are Cool!, Sweet!, Live!, and S.A. voices, then this is a game changer.

First, it would allow users of the new board to play T3 styles (which are available in cyberspace but don't work on the S900 because the S900 doesn't have the voices).

Second, it would give us lots of new voices for accompaniment and for styles.

I think the two most important reasons to upgrade an arranger are 1) access to new styles and 2) access to new voices. The other reasons are improvement in features and build quality.

As far as improvement of features, the S910 offers little new. The only things that come to mind are the mp3 player and the better screen.

As far as build quality, I doubt there are any improvements. You can see that the new keyboard is built on the same exact platform with the same exact buttons as its predecessor.

But if this new keyboard has lots and lots of Yamaha's best voices, then I am excited enough to maybe buy two of them.

Beakybird