Troy, unless the few Hz lower extension of the EP800 would be significant to you, two EP500s would be the way to go, in my view. The two EP500s would have at least as much maximum volume capability, and properly placed(basically at the midpoints of the opposite side walls or front and back walls or in diagonally opposite corners)they would smooth the overall bass response by reducing the effect of room modes.

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Enjoy the music, not the equipment.