darthkringle,
I have had my system for Axiom system for almost 2 months now and love it.
As for the VP150, I tried the VP100 first and upgraded. Before that I had a Psb Image 8c. I much preferred the VP150 over the the Image 8 and also like the wider sound stage I have over the VP100. I also have no problems with the S sound with this center.
The EP500 is awesome, I upgraded from the EP350. Before both of them I had a JBL 12". All I can say is the EP500 blows both of the EP350 and JBL subs away.

M60 VP150 Qs8 EP500 Yamaha RX-V2500 Mitsubishi 52725