Recommend a SPDIF cable

The Black Cat Silverstar at $150 is worth trying. It is a very neutral and accurate sounding cable and can be returned to the manufacturer within 30 days if you don't like it. If you want a warmer sounding cable, the Oyaide DR-510 is also very good. Tweek Geek sells it for $190 with a 30-day return privilege. You can also find this cable online for less money, but you lose the return option.

Of course you can spend a lot more money on Purist Audio Design or Klee, both of which I have tried and liked a bit more than the cheaper options I just mentioned. Whether they are worth the extra money is another question. Given that you use Blue Jeans right now, my hunch is that you don't believe in spending a fortune on cables.

Please try the Snake River Audio Boomslang digital cable. Jonny will make it RCA to RCA or BNC to BNC. This digital cable easily outperformed my digital cable costing 3x's the price. Jonny will offer a 30 day money back guarantee, but you won't send it back.

You have to try several as they're very system/component dependent. That said, I've tried the Blue Jeans and never found it optimal in various RCA-RCA coax scenarios. I've also tried the SilverStar (and many other brands) and found it not quite as good as the older Stereovox offerings.

I'd recommend these: Wireworld Starlight, VH Audio Spectrum (with WBTs), Townshend DCT (hard to get outside the UK), a-rt U-byte.