I have assembled a lot of PC’s myself, and have used modest cables from name brands like Shunyata, Audioquest and Isotek, and I have used some boutique built silver plated PCs purchased on Audiogon. For bulk cable I generally use Furutech and am currently quite fond of FP-TCS31, 12 guage wire, even for digital front ends, but bulk cable from Nanotec is also excellent.
For connectors, I generally lean towards Rhodium. I concur with break in time for this metal being interminable, but I prefer the balanced, clean overall sound. I do like gold plated copper connectors for amps, and silver plated conductors can provide a unicorn brilliance in certain applications. Furutech connectors are well made, but there are a number of Chinese branded and made knockoff connectors that work very well - some trial and error required. Audiomeca brand PCs are a super bargain.
YMMV
kn