Barry, precisely because it’s to really hard to actually compare the sonic benefit of different racks, I attempted to measure what sort of vibration my dCS components were experiencing. You can read about it in the following thread and follow-up posts;
I think especially where solid-state components are involved, it’s very difficult to attribute any subjective listening experiences to vibration measurements. That said, with tools now relatively easily available to measure differences between racks/isolation, one can just pick the best from that objective comparison.
As Ben says, based on my (relatively brief) measurements, I really couldn’t justify swapping out my existing isolation/rack for anything “better” - peace of mind and money saved 