Follow this link to an explanation of the pros & cons to biamping according to Cary Audio Design. The fact that they want to sell you several Cary products isn�t subtle.
http://www.caryaudio.com/html/biamping.html

Also NHT shows how to drive two of their speakers from one NHT A1, sorry Outlaw 200. Yes friends, it appears the 200 is available from NHT. See my topic �Now Hear This!!� for the url.

My 2 cents on bi-amping is that everything you do to a music system will change it sonically. That doesn�t mean the sonic change is �big� or even to your liking. Whether or not you can justify the �upgrade� given the cost that may be involved is another thing. But I would suggest trying different solutions and making up your own mind. After all, isn�t that what this hobby is all about?