The M2i has a flatter listening window frequency response than the Wilson Audio WATT/Puppy 7. But that doesn't mean it's a better speaker or that it sounds better overall. The data is interesting and a good thing to consider. The NRC has proved the test data is somewhat relevant to human listening tests. However it's unlikely that every little bump on the graph meaningfully translates to audible differences.
Due to Axiom's return policy, you could haul your M60s to a Paradigm dealer and do an A/B test with the Ref. Studio 100s. In fact that would be a facinating test. Several possible outcomes:
(1) The Axioms sound better.
(2) The Paradigms sound marginally better but not sufficiently so to warrant the price difference.
(3) The Paradigms sound vastly, hugely better and the increased price is well worth it.
I'd bet on either #1 or #2. If you can arrange it, why not do the test? It would be good information to share, plus might give you peace of mind.
