This will be good.
I think I will make some popcorn and grab a beer and watch this thread. :)
Cables are witchcraft. Period.
Silver, Copper, Palladium, Carbon. Thin wire, thick wire.
Ceramic connectors, plastic connectors, plated connectors, solid connectors, gold connectors, silver connectors, copper connectors. Teflon, cotton, foam, or air insulation.
Lots more design elements...magnets, no shielding, heavy shielding.
It really does come down to what works in your system I think as stated. Try different ones from companies that allow a money back trial period.
Buy used ones that you can resell if they don't work.
Find out the generally believed characteristics of a certain cable which might suggest how it will mate in your system.
It also matters where in the chain it is placed (source>preamp; or premap out>amp).
Very generally speaking-your above example of tubes&copper and SS & silver is opposite of common thought, but it depends on the cable.
Have fun with it.