Yep - we are talking about the optical amplifer you linked to. My main remaining option is the optical-coax converter route you mention - not sure how much to spend on one - found links to models which sell for 30 bucks and 80 bucks - as a computer guy I would like to think that both convert all the bits faithfully or they don't leave the factory - though as you know in the audio world, some manufacturers hint that one digital is better than another.

In reply to the other post, I am using the optical amplifier at the 10 foot cable coming out of computer going into another 50 foot run - pretty much within the specs which come with it.