I would be using 2 channels from the amp if I did.
The reciever could handle the load though.
I like to swap speakers. Looking at the cost of the stand and new center it almost makes sense to add another pair of M80's. I will work my old towers back into L /R and will try the dual 80's for a while. It won't be for a while though.
I'd like to hear Brians setup too.
I like how my layout sounds but the center has to go. It will join the parts pile asap.