Power Conditioner/Surge Protector Options

Surge protection limits current and the last thing you want are sacrificial components to protect against surges. Surge protection will also limit sound quality.

You can't beat a large, big and heavy torroidial  transformer. This acts like a reservoir providing conditioned power while adsorbing excess voltage.

I have found Plixir AC and DC power supplies and conditioners to be excellent products, which are balanced in operation.

Plug your power amps directly into the wall, their coils are big enough to protect them.

There is only so much you can do unless you want to spend 10s of 1000s.

The Furman and Niagra are relatively easy sells. Buy all three, you be the judge. Quality of materials, design not just a few plugs in a box with a “surge suppressor” make a difference. 

they are not only easy sells, they can be purchased with 30 day returns...but then listening tests would be required...

I have not listened to my system with a TrippLite, except for the subwoofer.  Couldn't hear a difference. 

I used to live in a variety of dense apartment complexes though and I can say I could hear if the Furman was out of my system. It never sounded quiet enough or smooth enough without it. I use two now, one for the video stack and AVR, the other for the audio stack.  Maybe I need to be a real loud bass head to hear it but I've never heard any lack of dynamics. 

This is very system and home dependent.  If possible I’d recommend trying a Niagara, Plixir, Audience, and Synergistic unit in your system and given your budget. Read reviews and try those that seem to coincide with your system/sonic preferences.  Buy used, then you can try all of them and re-sell at very little loss.  It’s so system and user specific, that’s the only way I’d go.  Best of luck.