can you help me narrow my speaker cables short list please?

If you like the cables you already have, go the eBay or Amazon and search for braided nylon sleeving.  There are some white ones there.  It will cost very little.  Then just finish them off with heat shrink tubing to fasten the ends.

Go to any YouTube for DIY speaker cables and you can see how it's done.

GR-Research's website also sells a white DIY speaker cable kit that is high quality and great value for the money..

btw,

Roger Russell Speaker Wire

His Guidance, do the ’between the lines’ math

17 awg, 4 ohm: 20lf max

15 awg, 4 ohm: 30lf max

"Simply removing and cleaning the wires and terminals and reconnecting them can make an audible difference".

An advantage of the removable connectors shown: remove the connector; cut off the prior stripped conductors; strip 1" and you have new copper.

RAMM Audio OCC cables and connectors

Bluejeans will be equal to anything else you'd buy but at a much less ridiculous cost.

Try Ice age audio OFC speaker cables   -  giant killer.