Congrats Darth! Many around here share you main speaker setup...but many don't have and are curious about the EP500...so share all you can when you can!
In terms of the surrounding QS8s...I can't be of much help other than to say I use 12 gauge. I suppose you could go 14 gauge. I wouldn't go any lower than that. Sure, the surrounds may not get a lot of action like the fronts do, but they do have their moments where they need a good surge of juice, and the QS8s can sure take it.
Such a need would be especially evident in multichannel audio. Not necesarily DVD-A or SACD either, but just setting your receiver to 5 channel music will ask more out your QS8s than movies.
