Keep in mind a lot of the guys on the forum using an external amp are using the M80's (such as Micah), which is a harder to drive speaker than the M60, or any other speaker in Axiom's line, really. Guys like grunt and I am sure a few others are running M80's with only the receiver (albeit a nice one) without a problem. Grunt was saying it took about 90 minutes of 100 dB listening to shut his receiver down. Heck, he runs three of them a lot of the time.
In terms of sound quality, I agree with the others, is the perhaps 10% better sound worth the money?
