I have M80s and a Denon 1804(90W/ch) in a 12X16 space but they are in a corner and I sit about 7' away. the M80s are amazing at all volume levels, very detailed and full sounding at low volumes as well as when being played loud.
Axiom recommends Denon,Sherwod Newcastle-which they sell, Nad, Harmon Kardon, Yamaha for amps/receivers that can handle the 4ohm load easily. The new Onkyos appear to be working well with the M80s, as a few here have them.
You may want to check out the hearing things forum - auditions thread, to see if there is anyone near you to have a listen to some Axioms.
