Very good advice has been given. Like the others my first choice would be 3xM60s for the front which is not possible for most of us. Then M22 or VP180, M22 is cheaper will give you a better off-axis response and will compliment your M60s very well while the VP180 will give you a fuller sound as it's a full range speaker but will not give you as good off-axis response (although the VP180 does pretty well IMO for a horizontal array). The other option would be to wait for the VP160 that in theory should give you the best of both worlds http://www.axiomaudio.com/boards/ubbthreads.php?ubb=showflat&Number=355530&page=1

As for the price increase, it will affect all items and will be in average 2.8% according to the Axiom newsletter.

I still remember, way way waaaay back, before the VP180 when the VP150 was the "flagship" center, and people commented on getting the VP150 or M22 center. Although we all make certain compromises. Like I bought a VP180 for a new center when I could have gone M60 for a center to match, but "just in case" my plans changed, or if I ever (don't want to think about it) moved again, I would have more options with a horizontal center vs. another vertical, but then again, the M60 is smaller than the VP180.

Lots of sound advice. I was very happy with my setup, but went with the VP180 as part of my whole home theater sound upgrade since I am having a much larger room than before (more than double the cu.ft.) and I saw more bang for my buck with a bigger center than going from M60s to M80s.

Good luck. It is always a hard decision, but you are getting a great product any way you go from a great company.

I like what Nick, Bruno and Dan have said.

It's entirely appropriate to base part of your decision on aesthetics; a vertical center has a tendency to just "look funny" to some people. If that's you, just get the VP100, VP150 or VP180 and you'll be very happy. If you think you can wrap your brain around a vertical center, get another M60 or an M22. I don't think there is much debate left relative to the sonic merits of a vertically-oriented center channel.