Confusion about "high-end" racks

Apopira2, you are correct that there are substantial differences in basic concepts between the various racks. Basically your choice is tightly grounding to the earth or isolating your components. Isolation generally means making a choice about your lowest effect isolation frequency. Tight grounding seldom means driving a 10 inch I bar into the Earth twenty feet, but at best anything that shakes the Earth even locally will be transmitted into your system.

I have nothing to recommend other than trial and error to find what you like best. I must say that if I could afford to have Halcyonic isolation bases under all my components, I would. It removes motions from above as well as from below.

Chiroman, I had the good fortune to have been in audio since some cinderblocks and long pine boards was considered an adequate equipment rack. I remember how much my turntable improved when I put a jack on the rafters below the turntable. I remember taking tennis balls and slitting them along the seam in furniture casters with a marble shelf under my turntable which help with footfalls as I approached but ruined the bass. I remember being impressed with the first TipToes of aluminum.

I still retain the Mana stands that I bought 15 years ago, but I think their top shelf can be greatly improved, such as by adding a Neuance shelf or an Acapella base.

All that I can advise is that you will not keep whatever rack you buy indefinitely and that which you choose will interact with your turntable. I would seek an American made rack right now as the dollars value is vanishing, especially relative to the Euro and Pound.