Which power cord more important?

R1g,
The weakest design is the one depended on PC or interconnect quality.
The small manufacturers of audio equipment hide behind "clarity, transparency and simplicity", but in fact filtering and delivering clean power on the component level seems to be quite complex especially for the amatures.
The bottom line is that there's quite a number of devoted and hobbyists along with business given to more 'enterpreneurs' in high-end audio market with cable business in particular.

Rlg, That's why I prefer a good quality components that work best with stock PC.
I also can do upgrades to tame the PS noise in any audio/video components which takes me to near 10x less spending on good quality semiconductors and passives vs. high-end PC.
Most of Macintosh equipment doesn't even have a detachable PC guess why?