I suggested the M100. For some strange reason my suggestion wasn't good enough. The Home Theater Shack suggested 660 instead. I told them to get the high power version. They originally went with regular version and then finally added the high power version. You can read my many post in the nomination thread. The joke was I had to explain outrigger's and I was a little sarcastic about the upgraded finish to get to the $3000 price point. Being a home theater form you would think they would have known about the high performance drivers!