Hi Alain,
the only company that makes proffesional voices is cd-soft as you already know.
You can find some home made ones floating around the net.
There has been a discussion about the plug in boards. If you use the search function of this board you'll find it.
Most of them are quite old and outdated compared to the Pro. The boards recomended are the PLG150-VL board for its good voices, the PLG150-DX board if you like the DX7 and the PLG150-AN board if you want more synth sounds.
Each of these boards will increase the polyphony. Very handy, since the Pro tends to run out fast if you use multiple Cool, Sweet or Life voices with accomp and or VH.
Good luck
Eric
[This message has been edited by Eric, B (edited 05-25-2002).]
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer