I have 2 systems with digital separates, including DTI's so at any one time I am running 4 digital cables. This has given me the "opportunity" to experiment with a lot of cables. I have gotten some unusual results and have found that there is no universal cable that works well everywhere. The best advice is try and borrow some different ones or buy with a right of return. I am not familiar with Nordost and do not know what it sounds like. If you want a richer, smoother sound I suggest avoiding silver based cables. If you want a "faster" sound with more air and detail, try a silver cable. If you do not want to spend a lot of money, try the latest version of the Apogee cable. I found it better than the Canare cable mentioned above (you can buy the Canare already terminated for less than $20 at a pro audio shop). My other favorites are the Harmonic Technology (copper link), Madrigal, and even Monster Cable, but none of these may work in your particular gear.
Digital transmission cables
I am looking to upgrade the digital cable between my Altis Centauri transport and Altis Reference DAC. I currently use a Nordost Silver Shadow. It is very good, but perhaps there is something out there which would be an improvement. I've heard that the Kharma digital cable is excellent, but any other recommendations would be very helpful and much appreciated. Many Thanks.