It sounds like the coax only is the way to go. For those that use the unit at home without a dock, they will still need to install an RCA phono jack in their Empeg/Rio.

By the way, S/PDIF is a format of digital audio tranmission that can be carried over both optical (Toslink) as well as coaxial (phono,etc.). That is to say, Toslink also qualifies as an S/PDIF output. I just wanted to clear up the confusion.

Stu