I don't doubt cables in the signal path can and to make differences to what we hear.
I draw the line at 6 feet of passive mains cable at the end of the 10 miles or whatever of cable joining your system to the power station. If the 6 foot of cable makes a difference, why not the 10 miles?
I think this is imagined rather than heard. But each to his own.
If to you, you can be transported to 'another world' for a mere $6000, surely you would just spend out and be thankful.