Favorite cable brand.

Power: Dynamic Design, BMI, Snake River Audio Gold
IC: Dynamic Design, Gabriel Gold (Rapture R, Infusion 2), Sablon Panatela (older silver in cotton)
Speaker: Auditorium 23, Jade Audio Vermeil Gold, Snake River Audio Signature Gold, Duelund tinned copper

Normal caveats of system dependent, etc. of course....I've found DD and BMI power cables and GG interconnects to span my different systems, though, from high powered ss w/ less efficient speakers to moderately powered tubes and more efficient speakers. Never had DD IC's in my ss systems or SRA SC's in my tube system. 

Limited experience, but the SRA Boomslang is a great sounding digital cable.

My choices are from Grover Huffman using his Balanced SX  and Empress  PC on my ARC CD3 and SX speaker linking my CAP 151 to Apogee Slants.

Acrolink.

I use Acrolink power cords and interconnects in my system. Speaker cables are from Chord. The Acrolink power cords brought the largest impact to the system. Initially I bought one for the amp but got a second one for the DAC several months later. I actually paid more for the power cord than the DAC that’s connected to it. It may sound ridiculous but that's the reality.

Tellurium Cables, High Fidelity , Audioquest, Nordost, Kimber.

Moon Black Dragon digital coax and speaker cables.
Cardas USB and XLR.
Audience power cables.

This all copper combination is smooth.  No unpleasant edginess.

Six of the Audience Forte 3 power cords provide a subtle emphasis on the lower midrange and bass in my system.  There is a slight reduction in clarity, but I find the tone to be beautiful sounding and the smoothness to be a benefit was well.

I quit using Pangea and Synergistic Research cables recently because with my system there was too much resolution.  Clarity was amazing, but there was a cost with too much sibilance on some tracks.  These cables might be a better fit for a system that needs to wake up a bit.  My system needed to calm down some, and so they had to go.

I listen to music for 10-12 hours a day, and so it has to be fatigue-free.  I can do that now with no unpleasant surprises.