Looking for suggestions on good BNC cables

I have a spare 1M Nordost Valhalla digital cable with BNC connectors. This is one of the best in the market.

Digital cable performance is dependent, among many other things, on the relationships between the length of the cable, the risetime and falltime of the signal being provided by the component that drives the cable, and the propagation velocity of the particular cable.

As is almost always the case, the risetimes and falltimes of the outputs of the Esoteric clock devices appear to be unspecified. Therefore, if possible, it would be desirable to try to arrange a trial of two or three different lengths of whatever cable(s) you decide to pursue. One of those lengths should be 1.5 meters. See this paper by Steve Nugent of Empirical Audio.

The cables will be used going to and from a digital Esoteric clock.

While I'm not sure exactly how you are using the Esoteric clock, a point to keep in mind is that the cable connected from its output is presumably much more critical than the cable connected to its input.

Regards,
-- Al

The new Black Cat Silverstar 75 is quite good

I am using a Cabledyne silver digital cable from DAC to Computer BNC-BNC. Sounds better than a USB connection, IMO

+1 for another jedi's recommendation for the Black Cat Silverstar 75. Originally I had a McCormack/Mod Squad Wonderlinkthat I replaced the Silverstar 75 with. The BNC end of the Black Cat is a lot easier to deal with overall than the Wonderlink. The Wonderlink is a bit bulkier all around and could strain on your RCA plug if you were to use an RCA male adapter with it. At least that is what I experienced with the Wonderlink.