Best affordable digital coax cable for connecting transport to re-clocker?

You don’t need a special cable to the Synchromesh as it has a totally robust jitter rejection design. Same as the Benchmark series of DACs that reject all incoming jitter - no need for a special cable.

Special cables are only needed for devices that do NOT robustly reject incoming jitter. My advice is to avoid devices that do not thoroughly reject incoming jitter but everyone has their favorite DAC, even if most are jitterbugs.

@gdhal

The asynchronous clock is an example of jitter rejection. In the case of Benchmark, the incoming clock is digitally separate from the outgoing clock. Adjustments are made digitally at precisely 4 pSec intervals at an adjustment rate of less than 1Hz in order to match timing. If you can’t hear below 1 Hz then there is no audible jitter from the incoming clock reaching the DAC chip. It is quite simple to do this digitally - it is much harder to do things analog as 4 pSec accuracy is extreme.