My vote is for the Fuhrman AC-215A for your uses. It is a very simple little box with 2 outlets, a switch, and a 10 amp circuit breaker. It uses Fuhrman’s top line LiFT line noise filtering and also their best SMP spike and surge technology as well as non-destructive EVS technology to guard against dangerous voltage irregularities.
Ive used this unit successfully for a few years now and it had no deleterious effects on the sound of my Luxman L-590AxII Class A integrated amplifier. I moved it to my computer room when I bought a functionality identical Fuhrman unit with more outlets for my hifi. Plug in a strip to extend one of the outlets to several. Currently $123.00 on Amazon