Rack Recommendations

Go with wood, no glass or metal. Better sound. Take a look at the wood racks at cayinusa.com Well built, great value.

You can make the stand as rock solid as you want, and couple it as tightly to the floor as you want and use very high quality feet to support the entire affair. This stand will be excellent for allowing the energy in the system, the vibration produced by motors, transformers and such out of the system. But the problem is that this same system allows energy to flow up through the system from the floor, the seismic energy produced by Earth's crust motion, traffic, subways, wind, footfalls, air conditioners, etc. That is why BOTH types of systems are required for the best results - a system to allow vibration to rapidly leave the system without being stored and a system to disallow or attenuate structural vibration from getting up into the components. That's the whole point of the Big Bang when the Vibraplane was introduced in 1996. Hel-loo!

One way to optimize the isolation is to place one Machina Dynamica VibraBlock Damper on each horizontal shelf. This is a fine constrained layer damper which does not overdamp as it magnifies or refines the benefits of isolation to a shelf which is part of an already well constructed or weighty structure, also to speaker stands.
A second way is the placement of a number of inexpensive cryogenically treated mini isolator springs (Cryo Baby Promethean isolators from the same vendor) between the base of any component and the shelf it rests upon.
I have used these two ideas with an audiophile solid equipment rack as well as on shelves of conventional wood furniture. In both applications the beneficial results were clearly audible and very economical to implement.

Symposium Isis is the best get a used one!!

As others have mentioned, Adona is recommended; I'm very happy with mine!