Expensive is relative.
If you’re stressed out about a cable being the weakest link, stick with a professional cable like the Canare LV-61s with Nuetrik BNC Terminal and use an Canare 75 Ohm BNC to RCA Adapter. This is much preferred to using pre terminated RCA because most brand preterminated RCA’s can’t be true 75 Ohm.
You can get a custom made lengths at a very reasonable price and use that as a solid baseline.
Cables testing takes alot of experience and a very long time trial to really understand what it’s doing to your sound. The main variable is you and what kind of sound and level of clarity you’re looking for.
With more experience you’ll define for yourself what is an expensive cable.
Me, I use to think $150 was expensive but I’m way past that. That said, I still use Canare Cables in my system due to synergy.

