I don’t have a dedicated listening room. I’m in a studio apartment and my listening area is basically my living area / kitchen so I have to keep things aesthetically pleasing and utilitarian as opposed to looking like a hi-fi shop. That’s just not my style. That being said, My floor is concrete and granite with a carpet covering the listening area. Spikes are purely for keeping the stands secured as I heard no difference between the spikes and the footers. I prefer Herbies fat dots under the speakers as they are nicer don’t ruin the finish of the speakers like blue-tac or sorbothane. As hard as I’ve tried, I can’t detect the micro nuances of coupling material, outlet covers, ethernet switches and cable lifters although I’ve kept a few tweaks that I thought made sense and were well made (eg: damping plates).
Also, The REL is raised off the floor on a 1.5in granite slab. I had ridiculous room boom with the sub on the floor and putting it on the slab and taking it out of the corner solved the problem perfectly.