I know that this may cause some trouble here, but I really think that my M60 sounded much better after a few days. I don't know if it is my ears or speakers to break in, but that is my experience. Give them some time, and let them play a while before considering a serious listen.
Never heard of Mordaunt-Shorts, how much are they? Comparing both speakers at your home, with your own equipment is the right thing to do!!
And as everybody here says, give Axiom a call if you find any problem with yours. I am sure they will answer all questions and will do their best to solve any problems.
Finally, trust your ears and insticts, and do whatever is best for you. Good luck with your decision and building your home theater!!
