Hello out there!

I'm new to the forum here, so forgive me if this subject has been beaten to death already! (I have been enjoying my Axiom's for years though) I am looking to rearrange my room to accomodate the new rear channels in BD movies (DTS-ES/DD-EX), and not sure the best way.

Currently, I have M60's, QS8's, and a VP100 running for 5.1. I have the option of connecting 2 M1Ti's for the back channels, but I think the look of another VP100 would be better suited to my room. I'm under the impression that there are only 6 channels running in 7.1, but that the back channel is split into 2 mono signals, so I'm wondering if there would be any noticeable difference? Anyone tried both ways? Thanks, you guys are great.