I use Mogami 2964 / Canare RCA coaxial from enoaudio bought at Amazon for ~$40. Running between Node2i and RME ADI-2 DAC. I have run RME bit test between these components on both the coaxial and another Toslink and the transmission is 100% correct. Even if you spent $40,000 on a super-exotic cable you wouldn't beat the 100% correctness result. Which tells me I could have gotten an even cheaper cable on B&H (Hosa?)
