There are loads of feet around. For the base of my racks and speakers I use Kripton spike shoes from Japan. They are very heavy. Very wide so spike slippage is unlikely, and have an inset silicone ring underneath that deforms when weight is applied. it takes non of the load but makes slippage across wood or tiled floors difficult whuch is great for keeping the rack in place.
Under my non racked hifi I use Quadraspire Qplus interfaces between hifi feet and surface.
I have to say that I have found Chord Company Silent Mounts absolutely amazing, they are not cheap, come in packs of four (although their customer service is good so they may respond kindly to a request for help).
Having had them under my speaker stands for four months, on carpet, they have settled nicely and have almost totally eliminated vibration/ringing in the stands.
Not owning any Naim, I cannot describe it as a box change, but perhaps as much as going from lingo 3 to lingo 4 on my turntable.