I doubt there are many people who have the AX models. We occassional get a question regarding them, but I have heard of noone besides myself that owns them.
The AX lineup had bookshelves (1, 1.5), midsized (2) and floorstanders (3,5). At one point a sub and center were introduced (if memory serves). They then went ASW cabinets, and then the current lineup started to show up.
For those interested in why I have not moved to M60's, the reason is that I decided that I wanted to spend my money on other equipment. I found the need (want??) for multiple distinct systems, and built them according to my goals for them - i.e. background, midfi casual listening, and audiophile/serious listening.
