How to choose a good fiber optic cable??


Does anyone have a handle on the science of what factors determine a good fiber optic cable for audio? I'd like to make use of both digital inputs on the Dlink III and recognize that the fiber input has more jitter than coax. What would the checklist of features be to get the best possible outcome out of a fiber optic interconnect purchase?
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For what it's worth, I tried one of those uniqueproducts cables. I got it on ebay and paid $29 for it shipped and that was a deal. It blew the $80 cable that I got at my local boutique shop out of the water with more detail and better mids. I will be ordering more.

I'm sure that there are better out there, but I don't know about them and ignorance can be bliss.
I was told by many to try the Lifatec optical cables....i really like what i hear, although I have not compared them to anything else.
Anyone try these?
thanks for the suggestion on the uniqueproducts glass toslink. i ordered one sunday night and it arrived on tuesday at noon. got to like that. hooked it up to my emotiva erc-1 cd player to mf v-dac and it sounds as good as some of my 200 to 300 dollar cables. great value and there are some other interesting products on their catalogue.