"Coat hangers work just as well" isn't a theory. All you need is plain OFC. Other 'bells and whistles' won't make things better, but they can make things worse. Just don't tell that to snake oil cable manufacturers, or those who support them.
The ONLY thing you should be thinking about is how thick your coat hanger, er, OFC wire needs to be. 12AWG is what I use, but even that's overkill for my distance.
And the ONLY reason to spend ungodly amounts of money on speaker cables is if you want them to look pretty, as decoration in your setup. Because they will NOT make anything sound better. That is a fact, not theory, based on both measurements and double blind testing. It never fails.