Power Conditioner, which of these 4 and why?

I just bought the Isotek Aquarius.  I like it very much.  I have a Bryston 14bsst amp, a deHavilland preamp and a Wadia 581. Dead quiet soundstage, sparkling highs and nice bass.  The Isotek runs cool to the touch.  I solid investment for me personally.  I will soon add a couple of streaming/DAC devices to it.  

If you’re able to step up your game, I highly recommend Gigawatt. I own the new PowerPrime. 

I just returned from RMAF and noticed many of the high end rooms were running Gigawatt products. 

I had some. ((Bybees x 2), Acoustic Revive, PS Audio...)The one that beats them all in MY system is the Torus.