Pbb -- have you tried any of the free/dirt-cheap means of isolation mentioned above? Or even any of the expensive ones? Yes, no, if yes then with what type of equipment (e.g., CD player)? Just curious.
What is vibration isolation for?
Where do these vibrations come from? From where I stand the earth doesn't shake too badly?! I would think that most vibrations would come via sound transmission through the air directly through the chassis of the components thus rendering the racks or other vibration isolation, uh, useless, no? (with the exception of actual thumping from walking etc)