Hi jtg_ts! Go silver if you can afford it. Some other brand might be cheaper. Test (with a magnet) all the connectors in the speaker path (amp and speaker box connectors and be sure they are not magnetic (contain iron). I just switched out some connectors on an amp with all copper ones and there is a definite difference (improvement). You've got pretty good cables now. Be sure other connectors aren't preventing you from hearing how good they are. Happy Listening!
WBT Banana Connectors
I recently acquired some Canare 4s11G to make speaker cables. 10ft runs, for JBL L100s and a Marantz 2270. Has anyone used, or a fan of the the WBT Bananas? I am considering the copper version, silver a bit out of budget. Also would welcome hearing experiences on working with them making cables. Thank you!