To my ears they sound like the typical compressed MP3 sound of the Tyros 3, and lack the life and vitality that the music demonstrated requires. (As per usual my comparison is with real instruments and players, not other manufactures boards)
Others will probably have a different opinion, so have a listen and see what you think.

Bill

http://www.yamahapkowner.com/?p=1947
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (Iļæ½m definitely staying put).