FWIW, after trying countless variations over the years, including some mentioned above, I have finally found extreme satisfaction with the following combo under my digital sources, (configured as the text is viewed)
-Front End Device
-Boston Audio tune Blocks (w/tungsten carbide beaings)
-SAP Relaxa magnetic levitation platform
These are mounted on a multiply decoupled very low mass lossy rack, the result of which has been a very apparent increase in soundstage size, dynamics and resolution, without any tonal shift.... and all up for very minimal financial outlay.
-Front End Device
-Boston Audio tune Blocks (w/tungsten carbide beaings)
-SAP Relaxa magnetic levitation platform
These are mounted on a multiply decoupled very low mass lossy rack, the result of which has been a very apparent increase in soundstage size, dynamics and resolution, without any tonal shift.... and all up for very minimal financial outlay.