Generic 12 gauge speaker wire for about $.40 a foot will be indistinguishable from anything at the same gauge unless you know what you're listening to and the placebo effect can work its magic.
Generic interconnects work the same way. I spend at little more for $1.55 total per 3' interconnect as insurance against galvanic corrosion with gold plated RCA jacks.
Or concede that it's guy jewelry, costs less than anything with a motor, and buy whatever looks nicest.
If you want better sound invest some time in speaker + listener placement (which may not meet spousal approval), acoustic treatments, or more accurate speakers.