Apogee Wyde Eye is the best low-price cable I know. I had one for a long time. I've just moved up to the Ven Haus cryo'd Pulsar and it is terrrrrrific. Smoooth, with detail detail detail, no edge. It takes a long time to break in but the upside, as you leave it burning in 24 hours in 24, is that you come home to a noticeably better cable every single day for about 3 weeks. No kidding. And it doesn't even sound bad out of the box!
Just make sure, whatever digital cable you buy, that it is at least 1.5 meters long.