Richard Hardesty, who publishes the "Audiophile Perfectionist Journal", did an extensive review of amps -- both stereo and multichannel -- about a year ago, and the Theta Dreadnaught was his top choice for multichannel. Based on what I've read and heard (I have not heard the Classe), I don't see how you can go wrong with either the Dreadnaught or the Levinson.
