Bill, having played with the S-910 for a couple days, I assure you that there is a world of difference in this upgrade. As Larry said, the new sounds, better and improved styles, plus as others have noted, incredible right-hand voices(instruments), makes this a big bang for the buck keyboard that is more than worth the few hundred dollars it will cost for the upgrade. There are lots of full-time entertainers using the S-950 now, and nearly every one of them provided glowing reports.

Gary