Iv tried a Ton of diffrent Power conditioner,
The best iv heard comes from Ralph @ Atma-Sphere i purchased a unique that was bought up to spec, it was the Elgar 3000b Its massive and was built like a Tank this made a massive diffrence in line noise, However the voltage was not suitable to the country i moved too and had to sell it off. This was one of my biggest regrets.
No other came close to the Elgar untill now the Puritan Labs, I would still say the Elgar is a better unit but this is easier for USA buyers to use.