On a lower budget, I would look at Signal cables. They compare very well to multi thousand dollar cables. It's a true 75 ohm cable and is silver based.
If you have deeper pockets, I would look at the a KCI Silkworm Pegasus digital IC (I use one with WBT Silver RCA plug and a Vampire BNC connection on the other end). This is an extremely smooth beautiful sounding digital cable. The details are all present but there is a smoothness in the sound that compliments digital source components.
Other than that, I've had awesome experiences with Kubala Sosna AES Interconnect, Purist Audio Dominus, Virtual Dynamics Revelation and a few more. Anyhow, my current all round recommendation is the KCI Pegasus. John is an amazing gentlemen who really knows what cable building is all about.
The cable is unshielded, uses pure gold, silver and platinum. He barely charges the cost of materials and has a very small markup. Buying direct from manufacturer saves you a huge amount. My one meter cable was about $899 a meter if I'm not mistaken. If you weren't buying direct from the manufacturer, this cable would be about the typical markup which is minimum 5x, about $4500.
Anyhow, hope you get a good digital cable as it is one of the most important cables in the system. It is the cable at the root and heart of the system and signal integrity only degrades from there onwards. I urge you to choose wisely.