OK.
I tried a Furman 15PFi on my Denon receiver 4806, and it really was the perfect match for it. i returned the (new) Furman as it was MO overpriced for what was in it.
Later i found a used Furman REF20i for $1,500 close enough to go pick up, and I have been happily using it since.
I like what the Furman 15PF did.
If you found a used one, or got 25% off (Furman has a high markup) Paying retial for it is way too much.
Though, I am a cheapskate, and I have to say the 15PF was a great unit with my Denon. Synergy.