I will take a guess and say that the converts from Axioms to Rockets was based on a desire for real wood, now that Axiom offers real wood there may be less converting. The specs and descriptions of Rockets seem similar to those of the M50's. Looking price wise to M50's you would be ahead more $ going with Axiom again.
Again I state this is just a guess and my opinion from what I could read rom the various reviews.
I would love to be able to audition some rockets just to compare but the shipping to Canada is WAY too much, which is how I ended up with Axioms.
