I've done a direct comparison between the Q500 and my M80v2 in a 13'x17'x9' moderately damped room. I was sitting 14' away. The speakers were spaced almost 12' apart.
When I sat dead center, there was no contest. The M80 presentation shamed the Kef.
When I sat anywhere off center, it was a different story. The image of the M80s collapsed terribly. The Kef image held tight and was frankly uncanny. It wasn't correct but it didn't collapse.
The M80 mid-range was unbeatable.
All of this was at 5 to 10 watts per channel.
