I'm having an amp built with all internal silver wiring.
That said, silver isn't always better. It is however, always about 7% better conductor than copper. However, conductance (inverse of resisistance) isn't always the governing parameter.
You quote what others have said about silver. I generally ignore these wine spectator sounding monologs. Everyone feels that if they can't write a review that includes "subtle hints of anis and manure" they aren't really and audiophile and I think most of them are not very accurate. Use your own ears.
One rule of thumb I have about silver. digital signals always benefit from a little silver. but since it is such a low level signal, silver coated copper works well.
I am currently using silver/gold/copper interconnects by Mundorf but I've been meaning to build some pure silver ones and your post reminded me to get that wire ordered.
Enjoy.
Jerry