Rich, have you tried, just temporarily, to move them more into the room and see how the soundstage changes?
I've always suspected Axiom started the family of curves refinement with the v3 but perhaps didn't get as far as they wanted. I can't say for sure, but I surmise the v4 has improved on the curve implementation and of course the tweeters. Those tweeters are simply wonderful to listen to over the v2. Between the v3 and v4, the cross-over materials and layout may have improved also.
I am telling you Rich you should seriously give the M5s a try. I haven't heard them against the v4 M22s - only the M3s - but I expect them to best the M22s in every way.
I'll just add that I don't think the v4 can possibly get any better with the current architecture. I think a digital, active cross-over is the only possible improvement.
