The Psr 9000 has 36MB of sound the 9000 Pro has 48MB of sound, including a great Grand Piano. I love the 76 synth action keys.

I love my Pro too, and with the Psr 2000/CVP209 Styles it sounds great.

I'm with Esh, that I don't need internal speakers. I'm quite happy without them.

Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer