So, I have completed a "temporary" set up of my new 5.1 system.

One thing I had been worried about was the possible timbre mismatch between my Hales fronts and the VP150. It turned out that this is a non-issue. In fact, I found that timbre difference, if any, was more apparent between the VP150 and QS8. Moreover, the Pioneer's MCACC really seems to do a nice job of further eliminating the timbre variations among my speakers.

I have not carefully listened to the QS8's yet, but I can already say that I am highly impressed with the VP150. This is a heck of a capable center channel, which lives up to its codename of "Vocal Point"! I am already confident that these Axioms are here to stay in my house.