+1 @erik_squires I too have a PF15 elite. It was the best bang for the buck I've ever made. I recently tried the Niagara 1200 and could tell no difference what so ever. I sold it and put my PF15 back in my system. I also use another one for my TV, it makes a difference.IMHO you would have to move to the 3000 for any real improvement over the Furman. Good luck out there! FYI I am running a McIntosh MA352 integrated, Aurender A200 streamer and Rega P6, with Sutherland preamp.
Furman Upgrade to Niagra
I remember ready an article some time ago by @erik_squires on 110v power and him recommending these as a good place to start, so I bought a couple of: https://furmanpower.com/product/15a-6-outlet-surge-suppressor-strip/
I recall him saying to use one bank for analogue and the other for digital. Well, I have no analogue gear, so I just use all the outlets as needed.
What would an Audioquest Niagra 3000 or even the Niagra 1200 do for my system over and above my simple power strips, would the large monetary investment be a substantial beneficial to my system over my pair of PST-6s? Thanks.