These will be used between DAC and (integrated) solid state amp, approx. 1 meter length altho .5m might also work.
Far as copper/silver, shielded/not, I can't say - I'm more interested in what delivers the goods, in that price range, opposed to specs, I think.
I realize there's some subjectivety to this and I'm willing to try a few; I'm basically trying to build my "short list" of ones to check out.