6inches might be too short for a meier stagedac+csp2+ combo...if u r sitting them side by side.
i tend to buy 2 to 3 feet length...just in case i wanna use them on my home-fi setup in future.
If u have existing RCAs, use them first, and see how u like the sound of the whole setup,
whether its too bright or too mellow..
then decide whether to buy copper or silverplated or silver..
to my ears, these metals do have some characteristic flavor.
btw, i think u will love your setup...stagedac /csp2+ /T1 .... :)