gbmcleod, you must have a very sensitive system. I didn't really experiment much with isolation devices. The biggest difference for the better I heard was when I put Boston Audio graphite tuning blocks for speakers under speaker spikes, I use Polycrystal not steel spikes. Big improvement in everything. Howerver, I have free resonance speakers that do have excessive resonant energy. Another example, much smaller but still significant, is that I put one 1/2" Walker resonance control disc near turntable motor on the maple block the table sits on. The maple 3" block is in turn sits on three big Boston Audio tuneblocks. And all this construct is on a wooden floor, no rack. I tried to put the second Walker disc near tonearm on the maple block and it got a little worse. And just one disc near tonearm made no audible difference. I also put one Walker disc on top of my Nakamichi cassette player - same improvent as with the table. And my integrated solid state amp definitely sounds a little better when sitting on brass Audiopoints than on Boston Audio tuneblocks. So yes, isolation is very important, though I call it tuning. But I don't think my sysytem is as sensitive as yours.
Electricity here is terrible, just terrible. Very dirty and voltage fluctuates almost constantly. Without my PS Audio Premier regenerator the sound is unacceptable most of the time. And I mentioned power cords, older Purist Audio Dominus did wonders when was put on the integrated.
So, my advice would be to learn how to fully tune your existing good set-up before moving much higher, or it will be a waist of funds and nervewrecking experience.
Electricity here is terrible, just terrible. Very dirty and voltage fluctuates almost constantly. Without my PS Audio Premier regenerator the sound is unacceptable most of the time. And I mentioned power cords, older Purist Audio Dominus did wonders when was put on the integrated.
So, my advice would be to learn how to fully tune your existing good set-up before moving much higher, or it will be a waist of funds and nervewrecking experience.