Looking for a line conditioner

Depends on the quality of power you currently have. My recommendation would be to run a dedicated line if possible and get the conditioner only for digital. I’m not a fan of puritan as it reduced dynamics in my system with only the source components plugged into it. Plugging in Pass XA30.8 into the puritan further exacerbated this effect. I ended up selling it. Running everything direct to wall now. 
Shunyata power conditioners always worked pretty good in my system. 
 

But as @tvad stated, the only way to know is to try

The Shunyata Denali provided significant improvements in lowering noise floor, increasing detail retrieval, and reproduction of micro dynamics without changing macro dynamics.  There are isolated zones, two high current outlets for amplification and four low current zones for digital equipment.  I also can recommend Audience.  I have an AR2T supplying an Aurender N200.  In this configuration I can shut down power to all other equipment with the Shunyata while leaving power on to the Aurender as recommended in the Aurender manual.  

Depending on your budget Audio group Denmark  Ansuz have excellent line conditioners Thst use bunches of Tesla coils and other technologies 

my brother owns one and he has many $$ items they work well starting around $3k  on up.

Puritan make a very good one for around $2500, I see people modding these though with Furutech Copper contacts , for even myself wrote to them telling them to use all Copper receptacles instead of much lower grade and conductivity Brass .

I had been a skeptic regarding the sonic effects of power conditioners but I had an experience at the 2018 AXPONA that blew my mind. In the Borreson/Ansuz room they were doing a demonstration of their power conditioner. They would plug everything (preamp, amp, and CD player IIRC) into a standard power strip, play a cut, and then unplug it and plug everything into their black box. I don't remember the model number but I do remember that it cost in the neighborhood of $25,000. They used the term "Star Grounding" when they described what it did.

When they played the system through the conditioner the difference was astounding. The noise floor dropped and background became pitch black. I fully didn't expect to hear a difference but as I sat their in disbelief I looked around and saw other listeners with their mouths agape having the same reaction I did.

As you might guess, I can't justify spending <$20k on a power conditioner but if you are serious about getting such a thing I suggest that you try to hear one of these. At the very least it can act as a reference to get a sense of what a conditioner can do.

The experience helped me understand what reviewers mean when they talk about getting a "blacker background." The Stereophile review of the big Niagra conditioner used this term to describe the sound. I haven't heard the Niagra but if I get the chance I would like to see if it has a similar effect as the Ansuz.