Wow, this seems to be a very popular thread - so many post in less than a day I haven't visited Axiom boards.
Great review Oz, very professional!! Great you have the patience to wait and audition so many other speakers. I didn't, I ordered my M60s same Sunday evening after I auditioned them at captPikard's, and I am not sorry. However, I auditioned a few other speakers such the usual ones in BB and CC and Tweeters, B&W 6xx, 7xx, and 8xx series, Boston Ac., and Paradigm studio reference 100 V3.
Very glad you did not notice the sibilance, very important. It may be some recordings, but I have ended up to believe that in my case is my room accoustics to blame (large window area, openings to kitchen and foyer, walls, etc).
Good luck with your decision, and please, keep us posted.
Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD
Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3