I am a huge Tg Audio fan! so keep that in mind.... the 688 is more in line with your HSR-I sound wise, and is a bit sweeter than the SLVR. So if you go SLVR, try that on the amp first, with the HSR-I on the digital.
If 688, then see which you like where. The HSR-I is still a great digital cord, but just a bit less air and hall info than the 688, and the SLVR, on most gear here.
I am not a fan of the JPS ac cords (Digital, Analog, and Power+) as they sound ok if you just listen to music, but they do not stage well for me (if you want players in the room, or want to be transported to the venue like the Tg Wires do so well...)
If 688, then see which you like where. The HSR-I is still a great digital cord, but just a bit less air and hall info than the 688, and the SLVR, on most gear here.
I am not a fan of the JPS ac cords (Digital, Analog, and Power+) as they sound ok if you just listen to music, but they do not stage well for me (if you want players in the room, or want to be transported to the venue like the Tg Wires do so well...)