PM, although there're no specific limits, 60 feet is longer than is usually suggested for the maximum Toslink run. Apparently your Sony has a very good optical converter(or at least better than the NAD). The optical amp should have helped the NAD, though(are we talking about the same thing, like
this ?). Also, if you had to use an optical output, you could have considered feeding it to a optical-coaxial converter and then running about 60 feet of coax to your receiver. Still further, there's no good reason to believe that the NAD will somehow be better for music than the Pioneer, Marantz or other similar receivers. The goal is transparent amplification of sound, whether it's music or movie, a violin or a machine gun.
