Speaker cable advice

Avoid anything that is silver-plated. 

Anything with silver will make your system sound brighter. (Conductivity at 106%) 

Go for a continous cast copper with high purity.

Anything with silver will make your system sound brighter. (Conductivity at 106%)

Absolute nonsense. A myth repeatedly propagated by inexperienced listeners.

I am a prior owner (and lover) of Clear Day Double Shotgun bi-wire speaker cables, and a current owner of pure silver Audio Note SPx bi-wire. Neither were/are brighter than copper, or other multi-alloy cabling I have owned.

Agreed. I've had Clear Day, Tempo Electric, Cabledyne, and now Darwin cables and they're all silver and none sounded bright. They can sound as full bodied as copper as well.

All the best,
Nonoise

AQ Type4, solid copper is what you seek.

My Harbeth C7s respond very well with a larger gauge copper,11 or 12 gauge rather than 14 or smaller. They sound fuller,warmer,and seem to have a bigger soundstage. I stumbled upon this trying two pairs of 13 g from amp to speakers. Any high quality copper with good connectors would be worth an audition.
The best I've found for my specific system (Aric Audio tube amp) are 11g ZenWave copper ribbons.
I'm also a big fan of Paul's(R.I.P.)Clear Days.