I had two Furmans, just sold the IT 1220 (20 amp), and have owned the Panamx 1000, and several Blue Circle pillows.
I now enjoy a Hydra 8 on the front end, and a hydra 2 on the amps.Both are fed two separate runs of 10 guage from the panels 30 watt breakers.
I also feed the hydras and gear with 3 Annaconda Helix power cords and a python cx.
In my limited experience, the Shunyata gear has made a major improvement in the sound of my system( Ref 3A Grand Veena, Audio Valve Eclipse,Red Draggon Leviathans, Rega P9, Audio Aero Capitole).
I can't see how anyone living in this century with all the crud on the grid finds "wallplugging" superior.
I can't vouch for any of the other top grade power conditioning gear because I have no experience with it.
I would venture to say that it is at least the equal of the Shunyata and if it is, then well worth the money.
In the last few years that I have addressed the power situation,my system has never performed as flawlessly and as naturally as it does now.
The investment was substantial, but the benefits in improvements to my sound in my feeling was more economical than making the upgrade in electronics .
I believe I would have had to at least spend four times as much money on upgraded electronics to match the level of sound my present gear has with the Shunyata system.