Thanks again - bit challenging since the one guy here at the audio store that I think is knowledgeable is unfamiliar with Axioms, has other 4 ohm speakers though - thinks the Onkyo A-9755 is ideal and a bargain at the price (feels 'regular' Onkyo amps/receivers may have issues but unless there is something specific with the M80s the 9755 is the best choice etc)