Linda,

The difference is sounds, plus a host of other improvements, is incredible. However, for the slight difference in price between the S700 and S900, I would spend the extra money for the S900. Lot more features, better sounds.

Gary

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Travlin' Easy
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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.)