Hi Linda,
 The hype about the SA voices? Believe it...they are remarkable.
 Having said that, they do require a change in playing technique and phrasing to sound at their best.
  I would have purchased my S900 for just the SA Sax and SA Concert Guitar, two voices I use a lot....the other SA voices were just wonderful extras.
  I usually make sure that any styles I create/assemble use the mega voices wherever possible as they do heighten the realism.
 I don't use the Mic and Vocal Harmony, at least on gigs, but it is a great tool for trying out songwriting ideas at home, and a real hoot for a party and a bit Karaoke when the occasion presents itself.   
   I have several friends who purchased the S700 and are very pleased with it's sound and performance, and it is certainly a marked step up from the PSR-2000.
  I believe you will be more than satisfied with your new S700, and I'll forward to your comments about it.
   Congratulations,
    Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.