My upstair system is with the LS3/5a set up. So far, the only successful system which I was able to build to give me really more for everything the LS3/5a has is the Avalon Ediolon for my downstair set up. Ediolon is driven by a pair of MC-275 McIntosh in mono. The amps is paird with CAT Ultimate preamp. More details with spooky mids,wide sound stage and deep bass. It was painful for me to take couple of years to fine tune the final positioning of these speakers and also to adjust the acoustic of my hall, it is too highly sensitive speakers I ever experienced.