for a 13 x 13 room the 80's would kill you.
Only if you're not careful. I have them in a 14x20 (x8.5) room and have managed to walk out alive after listening several times.
With that said, they undoubtedly play
much louder than I need for my room, but I think even at low volumes that they offer absolutely incredible detail. (I haven't heard the M22 head to head, so my advice isn't directly relevant to your question, but that never seemed to stop me in the past, and I'm not going to let it now either)
Jason