I haven't tried all thonte presets on the sx900 VH, but I did find one that suits most of the "stuff" I do--Country Rock. The VH would be usable for me. I'm definitely NOT a power singer.
Maybe it's just me but I think the VH is improved over previous PSRt performance volume s, but maybe it's just some better presets.
I doubt it Don you won’t really know till you use it live on stage at performance volumes from all angles on the mic... Good luck