Suggestions for Giant Killer rca coax digital cable under $500 used

Analysis Plus Digital Oval.

I use a Wireworld Starlight Gold, which I believe is silver and it sounds very nicely balanced. I know swapping cables can be fun, but if you’re looking for “giant killer” results, I think you should upgrade your dac. If you sell the Pontus and move up to the Venus, you’ll likely end up spending very close to what you would fooling around with cables.  Cables are important, but the box is more important. 

Came across these guys recently.  Haven't tried them yet ... thought I'd pass along...

I have used Pine Tree Audio for 4 years. These are good workmanship and neutral. However, am experimenting with some different cables.

For interconnects and digital what is the difference in sound, in general.

Sold OCC copper

Copper with silver plating

Pure silver.

I also thought Rhodium coated RCA with carbon ends. There are also silver and goal plated RCA connectors. These are all Chinese.  I got started after a dealer showed me a Audioquest Carbon(silver coated copper) which he was out of.  So far, I have a Chinese silver coated copper.  So far, it sounds pretty good for $13. It was funny different sellers use the same pictures, same prices, same descriptions.

Kimber D60 reviewer reference digital cable, Marigo apparition digital cable Jonathan Scull favorite. I have both as well.