Power regenerator vs conditioner

I would agree that the power regenerator you mentioned is better than the power conditioner. I am currently using PS Audio P12.

That's what I have. The difference in the sound of my system before and after is not subtle. Every bit of line noise I had before the P12 is gone. An investment worth every penny.

I have a PS audio pp5 I purchased used which replaced a relatively cheap panamax. At first I actually liked the panamax better, the pp5 made the sound very bright even through it may have possibly had more detail to it I could not get past the brightness. After putting on a DIY power cord and replacing the fuse the sound was much better. And then after buying a counterfeit PS audio AC 12 cord on ebay that PS audio was nice enough to replace it with a genuine one at no cost! (who does that?) and installing a SR orange fuse it now sounds awesome. The pp5 has a multi wave feature which seems to make the sound more fuller and not as thin, it comes with a remote were you can turn it on and off from your listening position which makes it easier to hear the difference. 

P.I. Audio’s UberBuss is the best power conditioner on the market. As good as the Shunyata Everest. Likely better; for 1/5th the price. Power factor correction of 1.

I have an former PS Audio P5 and all components except my amp are running off from. The P5 made a noticeable improvement in my system and our power lines are fairly clean. My amp runs off a Nordost QB4 II with QV2 and QK1. The Nordost has its own ground post, which I have running to a dedicated external earth ground rod which is not tied to the main house ground rods, besides being connected to Mother Earth which indeed they are. System is dead quiet and the noise floor is six feet under. I have not tried the Audioquest or newer Shunyata’s, but before the P5 had an older Hydra and the P5 was superior. Also using AQ receptacles and dedicated circuits and both devices I use make a difference.

OP — Because you seem to have these products in mind, I can share my experience: I have a Niagara 3000, a PS Audio P-15, and a Denali 6000T in my house, in different places.  Like you, the PS Audio narrative makes the most sense to me.  And I used the P-15 in my big system for a long time.  More than once it beat out the Denali.  (The Niagara 3000 was not designed for a big system and I didn’t try too hard to test that).  But I recently put in two 20A dedicated lines with 10 gauge wiring, one for the amp and one for the AC power hub of choice, identical length, etc etc. First of all, no AC solution bettered my system like that did.  Big time (and if you think about it, that sorta undermines the notion that — if you regenerate perfect power from scratch — it doesn’t matter what you start with).  Secondly, after settling into a more relaxed, quieter, yet more dynamic new sound, I tried the Denali in place of the P-15.  Denali was better by a non-debatable margin (but I still connect the amp to the wall directly).  Sooo, who knows.  I let my ears decide.  But I’ve read many times, and now experienced firsthand, that your existing power situation can determine whether you’ll prefer the regeneration route, the "distributor" route (Shunyata), or the conditioner route.  I’ll say this (Part 1): they all provide improvement in my experience, except your crappier conditioners that quiet down the noise by strangling dynamics.  I graduated from that trial/error chapter.  And I’ll also say this (Part 2): as my system has gotten better thru better speakers and electronics, the differences in power solutions are much more noticeable.  Everyone has their own opinion, but the AC power solution deniers are just, well, wrong.