Favorite cable brand.

Audioquest Silver Extremes! $90/pr close-outs available from HCM. Formerly $400/pr! 

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.