The M40 is a tower version of the M3. The larger cabinet gives you a bit more low frequency in the M40 but otherwise there is not much difference and none if you have a sub-woofer in your system. This brings your decision down to aesthetics, do you prefer the look of the M3's on stands or the M40's.
President & Chief Engineer
Edited by axiom on 06/06/01 10:01 AM.