Power conditioner Choice, synergistic versus Niagara versus transparent

Top choices, all about $5000.

Each does things a little bit differently anyone ever use these things? Recommendations?

Don’t have Power fluctuations so a regenerator doesn’t make sense.

It's curious that the PS audio regenerator continues to use electricity when not in use and more incremental use when components are active.  PS audio had a hard time explaining this - calculated electricity costs are about $10 per month to operate this thing.  Seems grossly wasteful.