going from a cheap lower guage power cord to a giant 8 guage power cord for only $500.00
If it's really so significantly superior, why not make it yrself for $5?
There no magic to making a reasonably good wire connector.
Indeed. Furthermore, many components are designed to be unaffected audibly by small details between one cable or another...they are supposed/designed to perform optimally irrespective of such minute differences/detail. Like your car - it should run without a perceptible difference on any equivalent appropriate grade of fuel...fill up at either Shell, Exxon or any number or reputable fuel suppliers without fear. (Refer to a Bryston manual for example)