Blindjim- Your interest in bi-amping seems to be driven by boredom or curiosity more than need. And, while bi-amping might be an available option, your speakers were not designed with that in mind. I believe that the Vandy and VS speakers mentioned above have proprieary inboard amplification designed specifically for the woofers they are driving. In your application, the matching would be by chance.
If you are unhappy with what your speakers provide, consider replacing them with something more satisfying. If you like what you have, then consider hiring Rives to upgrade your listening environment or buy a Magic Clock.
Otherwise just sit back and enjoy. If it ain't broke, don't fix it.