I went to Costco and found an HTIB with a Kenwood receiver and Axiom speakers. The centre looked like the VP50 and the other four speakers looked like a smaller QS4 (for sure at least 2 that was like the QS4, not sure of the other 2). The sub looked like it was specifically made for HTIB. I didn't get a chance to listen to them. Of course there was every other thing going as well so it would be hard to discern how good they were. But given that they are Axiom's I would assume they're pretty good.
