"Subs on the back wall will not work with the SuperSats, they would both need to be in the front."

Is this because crossover point is high enough that low freq could be perceived as localized??

Exactly.

right. i will go with Aon 3s on a stalk projecting as far from wall as physically possible. won't be pretty, but once I close my eyes and listen, who cares!!

thanks for all the advice.