Congrats on your purchase of the NDac. It is a very good combination with ND5XS2. There is a separate thread about this(Click here), in which various BNC cables are also discussed (use the search function ‘BNC’ ‘in this topic’ to easily find the posts). DC1 is certainly a good option, but not very cheap. I myself use a Neotech NEVD-1001 with Furutech BNC plugs between ND5XS2 and NDac. It costs only about half as much as the DC1 and I am satisfied with it. Enjoy your NDac!