Jim, if you are already using a Bel canto line stage, you may want to match it with a pair of Bel Canto REF1000M monoblocks. The REF1000Ms nmay largely address the issues of brittleness you are experiencing in the treble region, and are one of the most expansive, authoritative, and sweet amps I have ever used in my own system. REF1000M are almost as compact as your Red Dragons, and also produce very little heat. See my PFO review at:
http://www.positive-feedback.com/Issue43/bel_canto_ref1000.htm
G.
http://www.positive-feedback.com/Issue43/bel_canto_ref1000.htm
G.