That's a beautiful room, Paul. Certainly worthy of 7.1. Or 7.2
I must say, I'm with Jason on this one. Because the QS8's are so good already, going from 5.1 to 7.1 (with 4 QS8's for me) did not blow my mind like I wanted it to.
Clearly, you have already demonstrated a "want" for 7.1, and I doubt that's going to go away. If you question is "do I want to eliminate the possibility of EVER going to 7.1 in this room?" I guess I'd counsel you to answer "no". Chris is right - 7.1 seems to be a well-entrenched standard now, and eventually you won't be able to contain yourself in spite of anyone's opinion about the subtlety of the difference.
