You paid all that money for the Audya and now have to use an external VH unit??
When I buy a new car, first thing i do is change the Audio system for something that suits me better. I brought a high end Nikon camera and discovered the lens supplied was not flexible enough and after a few months brought an F1.8 macro/zoom instead ....it suited my style of photography better.
What is fine for one person doesn't always do for the next guy. Doesn't mean there is anything wrong with my kit lens or original stereo, or even the ketron vocalizer - some people just require a little more flexibility than standard factory options.