If you want the best performance in all ways plus the stability of the Sound Anchor stands, check with Robert Maicks at Star Sound for 2 things:
1.) they make a stand that is similar to their better racks in how it performs--these are expensive and will not be as stable as the Sound Anchors; and 2.) Star Sound makes a VERY FINE as in small round metal product to fill stands with. They will allow the stands to drain vibrations quickly to the floor.
This vibration draining is the same principal involved in making the awesome sounding Sistrum racks and platforms perform the way they do. I have 2 shorter racks that sound fantastic that are filled with the same super fine shot in the rods that hold the platforms. Robert at SS says his fine shot material will bring the Sound Anchors to new heights of sound and even more stable. He would most likely cut you a deal on the shot as it is pretty expensive to fill the rods even if you get 3 rod SA's. The sound is dynamic, with great clarity, and NO negative issues other than cost to do it. Granted, it's something no one will ever see, but, like better caps and materials inside a component, the change for the better in sound in all ways is very impressive.