Toslink/optical cable recommendations

I use http://www.uniqueproductsonline.com/gltodiopca.html
Low price, high quality - 280 strands of glass.

Al, I bought two of these cables many years ago and still use them today.  I've never tried a plastic Toslink but I suspect it would work exactly the same, especially with my jitter supressing DAC. Yes, decisions are often based on anecdotal evidence.  There is a little of black magic in this hobby and placebo effect - strongly supported by the law of proportionality (For $10k amp you need at least $100 wall outlet).  I have lost common sense long time ago.

xti16, you're welcome.  Cutting ground loops is great but Toslink sometimes is worse than coax.  It is a system thing.  What works for somebody might not work for you.  Optical drivers have slow slew rate (transition time) making transition recognition moment susceptible to internal system noise (producing jitter), but at the same time Toslink is free from transmission line effects, from electromagnetic or capacitive coupling of electrical noise and from ground loops.  Clean power supply (conditioner) could be beneficial  with Toslink.