Gentlemen,
Thank you very much for your responses.

Frank, have you tried (please forgive for suggesting,if you already have) either Xlutop "Chainer" or Dsound "RT Player Pro"
to host "Voicemachine"?
Also, could you please tell me the names of the other forum sites that you mentioned.
I would someday also like to trigger live
percussion sounds from a soundfont player,
so latency is a very big issue for me(<5ms).

It is probably the case, that you have tested every VSTi,DXi,and standalone soundfont player in existence; and the
winner(so far) is "LiveSynthPro" DXi.
Have you tried LiveSynthPro in the
Brainspawn "Forte" host?