After being able to listen to my 180 for a while and having the 150 hooked up in the other room it is easy to tell them apart. It is definitely a night and day difference. I finally found a disk in which voices go across the entire front and I was very happy to hear hardly any difference at all. As others have stated, the more I hear it, the more I like it. In my opinion if you have the room for this HUGE center it is well worth your money to upgrade to it. I am extremely happy with it.

7.1 theater room
60 fronts vp180 center 4 qs8's ep500 sub

3.0 tv room
m3's vp150 center