Troy, the first suggestion would be that the present consideration of any of those units is premature. When you get your M80s and set them up with your Pioneer you may find that it's more than sufficient.

Some of the stuff you read sounds like utter nonsense from someone not very knowledgeable about amplifier technology. The bottom line is whether the unit puts out enough voltage for the required maximum sound level with the speaker being used, does so with flat response over the audible range, and with inaudibly low noise and distortion. That's it; "class" can't change this. In particular, the statement about class D being for a PA system is absurd.

Enjoy the music, not the equipment.