I have since then purchased the M282. While I do like it, I doubt it will perform as well as a Carver. I have stated that I believe it helps the sound of my system, I have it driving my fronts which I think allows my receiver to give more life to the surrounds. However, in fairness, 2 knocks against it: (1) It is non-bridgeable in that you cannot combine the two channels into one to for example power the center channel. (2) I'm doubtful it would perform well with low efficiency speakers. Onkyo does not even give specs for 4 ohm performance.
The M282 meets my needs very well. But it may not be an end-all solution for everyone.