As one forum member has told me that has heard Rockets and M60s the M60s are more of a wow factor, more detail, upfront. The Rockets are more laid back so you have to listen or play them, a little harder to hear the details, both are excellent speakers in their own right. Just depends on personal preferrences as to which to buy. I would suggest checking around(Hearing things forum) for some one nearby that could give demo of Axioms and then check av123 to see if someone there is nearby as well, this would help you pick the sound that you prefer. There are many good speaker companies out there, I personally feel Axiom is the best bang for the buck.
SO far as a Denon avr driving 4 ohm loads, I have had an older 1804 and now my newish 3808 both driving 4ohm loads or less for several hours at 85db or loader in my smallish room with out problems, Denons are rock solid in my books.
