This is what a guy wrote to me about his experience and comparison.
Hi Truder, it was hard work today. The PSM 156 is really 2 classes better than the Niagara 5000. And then the Gigawatt PC-3, very strange, but apparently it contains a not very good DC blocker. The PSM gets my dac really quiet, but with the PC-3 the transformer keeps buzzing on and off. The sound and depth image of the PC3 is really great and it is very close to the PSm, but if you listen to them directly one after the other, you will notice that the PC3 tightens the bass a bit more and allows voices to come out better. The PSM is slightly more restless in direct comparison. In terms of sound quality, the PC3 would be my preference, but not if the direct current is not properly clean. My dealer, is now talking to Gigawatt to see if there is anything that can be done about it, I will hear that next week. In terms of price-quality ratio, puritan is well ahead, really great what they know to do for this money, fine power cables too. I wonder what will happen next week, it could be that I will end up with the PSM as the best all-rounder. Good weekend,
He bought the psm 156 anyway becaurse of the sound was almost the same and dc blocking was better from the psm 156.
Niagara 5000 5000€ plus price power cable.
Gigawatt pc3 evo+ with cable 5565€
Puritan psm 156 1550€ wirth cable.