Fred, disregard any comment that you read in Audioholics about "anemic base"; it isn't true and even the bass is quite adequate for most music(pipe organ recordings are excepted)when used without a sub. My in-room listening and measurements show good response down to about 50Hz and significantly weaker, but still usable, down to about 40Hz. The M22s are the Axiom bookshelf model having the most bass extension, being significantly lower than the M2s and slightly lower than the M3s, as would be expected from the larger enclosure which allows it to be tuned lower and the two drivers which provide more area to generate the bass frequencies.
As to using surround speakers when playing stereo source material, yes this is advisable and doesn't depend on the nature of the main speakers. Two channel material contains(in varying degrees)ambience which came from directions other than the front, and using processing such as DPLII, Neo:6 and Logic 7 to extract it and send it to the surrounds where it belongs makes the listening experience a little closer to reality.
