I have not made any sort of direct comparisons, so I have no idea which power strips are among the best. However, I did attend a very impressive Isotek demonstration at a local dealer Command Audio in Falls Church Virginia. The dealer has a dedicated subpanel for delivering power on dedicated lines to the listening room, so it is a far better environment than is a typical home setup at the outset. The demonstration consisted of playing music through the dealer's system before inserting the Isotek product for a comparison.
I was particularly impressed by the Isotek power strip--it improved the sound substantially for a pretty modest price (around $500, I believe). The system was dead quiet to begin with, so the improvement was not heard as a drop in noise level; rather, the instruments sounded more freely suspended in space and there was a clearer sense of notes decaying naturally.
I ended up buying their higher end products--a Titan and an Evo conditioner, but, I will admit that the power strip delivered a very large chunk of the performance that these much higher priced conditioners deliver.
I was particularly impressed by the Isotek power strip--it improved the sound substantially for a pretty modest price (around $500, I believe). The system was dead quiet to begin with, so the improvement was not heard as a drop in noise level; rather, the instruments sounded more freely suspended in space and there was a clearer sense of notes decaying naturally.
I ended up buying their higher end products--a Titan and an Evo conditioner, but, I will admit that the power strip delivered a very large chunk of the performance that these much higher priced conditioners deliver.