I have always preferred ST optical to other connections, but haven't always been able to use it because it is now rarely offered on DACs. Howard at Camelot Technologies recently told me that AT&T is no longer selling the receivers and transmitters for after market use.
What Ever Happened to ST Optical?
Based on the hype several years ago, I opted for the AT&T "ST" optical connection between my CD transport and processor. I've generally been satisfied with it over the years, but damage to the cable (oops) is forcing me to do a replacement. Is ST optical still a viable choice, or is coax better? Seems to be far fewer suppliers of the ST thes days-- my previous was XLO and they don't list it on their website anymore.