20m Optical Audio Cable - TOSLink SPDIF Cable

This is all you need. Some of the thicker cables can be a problem as they're not flexible enough and all that the thick sleeve does is protect the cable as a sharp bend will damage the optical fibre... Avoid all those silly "gold" plated ones- this is optical, not electrical! Also, metal connectors can damage your device's optical ports (which are invariably plastic) if they get a lot of plugging/unplugging/moving.

The cable does a good job and works flawlessly. It looks extremely thin, so I do have some concerns over durability. Time will tell, but overall you can't complain for the money and I have had good experiences in the past with Lindy.