I have a newer center channel vp180 and an older set of m80's maybe version 1 or 2 . I notice a difference in the tweeters, the newer one sounds better and the crossover does highs better than the old ones, what changed for the worse was the older speakers had nice brass binding posts to connect your speaker wire while the new one has cheap plastic ones. I think Axiom should go back to the nice brass ones even if the speaker costs a few bucks more. I am only using the center for movies so it is really hard to say but the titanium tweeter seems to be a big improvement but it still blends well with the older speakers. I push them all a lot and they do very very well. The soundstage is crystal clear on the front and I am happy. I noticed that the newer design keeps up with high paced piano music a bit better and you can tell they did some work to the crossovers.
