I currently have polk audio rt2000i mains, rt55i rears, and cs350 center channel. Would I be upgrading if I went to an all axiom setup? Like their qs8 surrounds, m80ti mains, m60 rears, and their best center(forget the number)? By the way, I already have the hsu vtf-2 sub. I just want to make sure i'm getting better speakers than what i've got if I go this route.