Someone posted this on vA forum. Quite good. Also, for solo voices, you can always use good VST instruments in vArranger that hardware can't compete with.

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DEMO with vArranger2

KETRON STYLES

https://www.dropbox.com/s/gjs0l23p57oftgi/SF2%206-8%20BALLAD.mp3?dl=0
https://www.dropbox.com/s/5t19arvzhlom5i2/SF2%20DISCOSAMBA.mp3?dl=0
https://www.dropbox.com/s/pm6e3uqpjmv1pp0/SF2%20BLUES.mp3?dl=0
https://www.dropbox.com/s/t63dhe2z5qfke6a/SF2%20BRASS2.mp3?dl=0
https://www.dropbox.com/s/nudiimt1tnxtt3g/SF2%20COUNTRY.mp3?dl=0
https://www.dropbox.com/s/dge32ztmfxxoh9k/SF2%20DANCE.mp3?dl=0
https://www.dropbox.com/s/4o0clfspu21n19c/SF2%20MARCH.mp3?dl=0
https://www.dropbox.com/s/dquoyudlcral54w/SF2%20FUNKY.mp3?dl=0
https://www.dropbox.com/s/4qgjxc5sgizodkf/SF2%20UNPLUGGED.mp3?dl=0
https://www.dropbox.com/s/tmnm2j2tpvb7rai/SF2%20JAZZ.mp3?dl=0
https://www.dropbox.com/s/fsh36gm9fm4hs43/SF2%20SCHLAGER.mp3?dl=0
https://www.dropbox.com/s/u1c6pqgcxakwtz4/SF2%20HARD%20ROCK.mp3?dl=0

PA4X STYLES

https://www.dropbox.com/s/7sdoox1ntrbr4md/PA4X%20DANCE%20FOX%20.mp3?dl=0
https://www.dropbox.com/s/sw49vrkh3155j30/PA4X%20DISCOFOX%20.mp3?dl=0
https://www.dropbox.com/s/7evjwywnf78h4ox/PA4X%20GIPSY%20.mp3?dl=0
https://www.dropbox.com/s/sigfqczhjt8idz7/PA4X%20MAMBO2000%20.mp3?dl=0

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There are some more, even better demos on the vArrnager forum.