Alex, keep in mind that regardless of whether you use a 30 watt, 300 watt or 3000 watt amplifier with your M80s that those numbers are simply the maximum output that the amplifier is capable of; you're the one in control of how much power is actually used. As Ken mentioned, you calibrate your speakers to an equal level, regardless of what the maximum output of the amplifier might be. The M80s are slightly above average in sensitivity and require less power than many other speakers, including the other Axiom models. It's unlikely that you'd use the maximum output capability of the units that you're considering.
