Since I’m a hobbiest drummer I only buy power conditioners designed by other drummers. That leaves me very little choice... drummer/ power designer Garth Powell. Seriously though, in my main system (TAD CR1’s /BHK300/Atma MP1) I use the Garth’s Niagara 7000 and really enjoy what it does on a micro and macro level.
Due to the disaster called 2020, I found myself away from home for a year and put together a small system based on a Hegel H190 and LSA Statement 10’s and didn’t want to spend a lot on conditioning. I ended up with a used Furman Ref15 fed by AQ’s latest bottom of the line power cord that Best Buy sells. (Both designed by Garth)
I really like what it did for the system and and at a very low cost. Incidentally I also picked up the AQ Powerquest 3 to compare with the Furman, which while quite old at this point (although almost identical to the latest 15i) I much prefer the Furman since it has energy storage for instantaneous current, similar to the Niagara.
Having tested and owning 2 conditioners that store energy to deliver greater than what the wall can for transients, I wouldn’t buy a conditioner without that feature.