The S-900 had some issues with display failure, and the sound quality has really improved with the S-950. That, with the addition of some new drum kits, some incredible instrument sounds, a handful of new styles, makes the S-950 very attractive.
Tony, after the first demo plays, there should be more links that show up at the conclusion of the first. Try using this link it may work better.
http://www.youtube.com/watch?v=qKPaMVjJqqQ&feature=share&list=UUG_GruQL_aP3QrS_zJQf7Kg Cheers,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)