Warm relaxed digital coax

Is there a reason why you can’t use USB with the dac?

Because if you can, there’s a really nice Audience AU24SE+ USB cable on USAM right now. 
https://www.usaudiomart.com/details/650117580-audience-au24-se-dual-wire-usb-one-meter/

Until recently I used the Acoustic Zen Absolute 75 Ohm Digital Cable with results similar to what you are seeking. There is at least one up for sale used. I am now using USB as my new streamer is limited to that medium. 

I can use USB.  I’ll check out these

suggestions. Thanks. 

I’ve tried quite a bit of equipment in this room.

i do have some acoustic panels placed and played with 

speaker placement.  So far I have tried 3 different 

coaxes and can easily hear differences.  The speakers 

do not sound bright.  I previously had sonus Olympica1

and Dali epicon1.  Klipsch surprised me, I was expecting

bright from what a lot of other people say about them but 

they are not.  Thanks again for the suggestions.  

Beer can relax guts so you should try dipping your cables in beer!