Worf -
How long is your room (screen side to back wall) and how far away from the back wall do you sit when watching/listening?
I have 7.1 with the QS8s. In a 20' room, sitting about 8' from the back wall, I have never really felt like the extra 2 channels do much for me. If you sit in the back row of my room, you hear them more distinctly, but from the primary listening position, the effect is very subtle.
If money is no object, I guess I'd say go for it as it will provide a slight improvement in your listening experience. However, given that you have to get a new amp as well as new speakers, I'm not sure I'd spend the money unless your room is quite long and you have multiple rows of seating.
My 2 cents...
Jason
