Hi, @mrdecibel -
Every cable, currently in my system, is silver (except for the 8TCs on my Subs). ie: 1 pair) Kimber KS1030 & 1 pair) KS1130, 2) SR AC Master Coupler X pcs, 6) Zu Mother pcs and 1 pair) Analysis Plus Big Silver Ovals.
Nothing pricey, fancy or- the, "latest and greatest".
It's always been my opinion: if you use a cable that has the best available conductor and dielectric, it just makes sense that you should be able to better hear whatever the rest of your components are putting out, good or bad. Given the rest of the cable's construction is worth a damn, of course.
Outside of some stridency, from some* 1970's, Siemens CCa's, that I tried in my CDP (it takes six); I've never had an issue with brightness. This moment: there are six early 60's (grey plate) CCa's in there and the presentation is excellent.
And: that's with the coaxial horn tweeters in my Emerald Physics speakers, which SHOULD let me know if there's a brightness issue.
As you mention: ears are a MAJOR variable and just one of a plethora, when it comes to this hobby.
*I had tried two of those, combined with four of the grey plates.
Happy Listening!

