The mega-voices sound pretty good on my 3000. However sequencing them from scratch on a PC can be very laborious (especially for acoustic guitar tracks) so I usually do the sequencing using a "normal" voice until I'm happy with the notes and then run the midi file through MegaEnhancer.

Another thing to note then using megavoices is that if you later decide to transpose the midi file you have to take care not to transpose any megavoice information held in the upper octaves.

Enjoy!

John