Bob,
The M3s are just awsome. I can notice no tonal difference on 5.1 material from the M22s as they just transmit vocals, and boy are the vocals VERY "full" and pure sounding. I would recommend the combo to anyone seeking a full and thick centre channel.
I have played some 2 channel music sourced to 5.1 from the receiver, and again noticed no sonic difference. I am not a "golden ear" listener by any means, but I love the M3s, a single M3 compared to the parallel M3 is very different.
The parallel M3s have an awsome sound stage, much bigger than the single M3. I love them very much and don't regret the M3 combo over an M2 combo or a VP150 (even tho I have not heard the VP150).
I will be doing some comparison listening tests with the M3s vs the M22s in the coming weeks. I'll posting my findings on here when I finally get around to it.
