Thanks for the quick responses, guys. I had a feeling I could run the M80's with my Yamaha (it does allow 2 speakers at 4 ohms), but doubt I could run the VP180 as well.

As well, I don't listen to my music, movies, and games at loud or extreme levels. My Yamaha is usually around -40 to -23 db for movies with the Energy's (which I find lack clarity/muddy).

So, if I understand this correctly, I can run all 4ohm speakers on my Yamaha with no chance of damage unless I crank them to high volumes (something I rarely do). However, a XPA-3 would have more than enough power to pump out the wattage and make these puppies sing. Correct?

Thanks, again!