I have the SCD-777ES, except for the balanced option, electronically the twin of the SCD-1, and after much, much experimentation, settled on Chris VanHaus' Flavor 1 for the PC and his fine silver ICs with Eichmann silver RCAs. The PC had less effect than using a BPT balanced AC line conditioner (I think it is a model 2.5 (???)). In my system, the BPT provided a significant improvement on the music.
BTW: to take the unit to an entirely different level of performance, I highly recommend you consider the VSE level 5 mod---he has another mod, the 5+, that I have not heard, but the 5 allows me to suspend my preference for vinyl when I'm listening to SACDs. There are several reviews of the level 5 on Audio Asylum that provide insight into the mod.
BTW: to take the unit to an entirely different level of performance, I highly recommend you consider the VSE level 5 mod---he has another mod, the 5+, that I have not heard, but the 5 allows me to suspend my preference for vinyl when I'm listening to SACDs. There are several reviews of the level 5 on Audio Asylum that provide insight into the mod.