Jp1208,
I'm getting excellent results with my Reference 9s using a PS Audio UPC-200 AC line conditioner. I think it's always best to use some form of AC line filtering when possible.
As for using pucks, cones, and such, I've experimented briefly with some of those things, but I'm presently getting great results with the Ref 9s standing on their own feet on a couple of corian planks set on my carpet.
I've recently had a sonic breakthrough using the Benchmark DAC-1 via its fixed outputs through a buffered, unity-gain solid-state linestage and then into the Reference 9s.
To my ears, using the Benchmark's variable outputs directly into the amps produced a very detailed and intimate sound, but one that was on the bright and thin side of reality.
Then, rerouting the Benchmark, using its fixed outputs through my buffered linestage and then into the amps literally transformed the system. The soundstage dimensionality literally took command of the room and all of a sudden there was a richness to the lower midrange and bass that just wasn't there before. I am amazed at the transformation. I believe this is the best sound I've heard from any system at any time. It is most certainly the best sound I've ever experienced in my current listening room by a considerable margin. Obviously, the system could not sound this fantastic if the Reference 9s were not doing their part.
I'll be curious to hear your impressions of the Reference 9s in your system once you have a chance to play with them and do some listening. They will definitely show you what the rest of your gear is doing or not doing and you'll be well rewarded for each compatible system change you try.