This is something that I'm hoping to accomplish when funds allow for it.
From reading about the Tri-center concept on the Magnepan website years ago, I seem to remember them talking about a Bryston processor (was it the SP-3?) that was a perfect way to drive this setup.
Maybe kmmd or someone else has experience with the SP-3, or the newer SP-4, or can tell us what amp(s) or processor they use with the setup.
The Bryston is currently out of my price range, but if it is the best option for this setup, and something that I can buy and use for over 20 years for both stereo and A/V, I would be willing to save up for it.