I use a environmental EP-2050 at the main panel.
Then I ran 8 awg cable to the front of my room that has a 60a(240v)Torus for my front amps.
For the rear I ran another 8awg cable for a small sub panel that has a 20a(240v)Torus that runs the rear amps,components,projector ect.
Around the house I use a few Digiplugs and a few Surgex protectors for main tv and computers.
Bubble inside bubble type protection as I had blown two F-113subs that were not connected to the Torus and the other two that were plugged into the Torus were good as all digital also.
That episode happened before the Ep-2050 was installed.