A friend got a huge 3 section HRS rack and two amp stands. This is the most solid, substantial and beautiful stand I've seen. Each shelf is designed with dampeners that are specifically tailored to the load of each shelf. The company works with the owner and dealer to get the layout and tuning of the rack right.
The price for all of this was, to me, astronomical.
I make do with a custom-built Zoethecus rack (alas they are no longer in business), plus a bookcase, numerous Symposium Ultra and Svelte shelves that either fit the Zoethecus rack or sit on the floor under my amps.
My choice of shelves, and couplers, etc., were entirely by trial and error. It is simply NOT the case that better dampening means better sound; there are too many instances where "more" means worse. I find that these products make the most difference with CD players and can lead to the sound becoming too dry and analytical if one goes too far.