Hello Thongoo,
I know the powercord very well, and it's one of the best powercords Electraglide has made the past years. There is not much or no comparison with the Epiphany X and little with model Synapses 1. They are much more about resolution and transparancy, but the Synapses 2 is more than that. It has resolution, colours, musicality, 3 dimensionality, etc. I can recommend it with confidence. I have not heard there new EG SOTA cable, maybe it is even better. Take into account that the brake-inn time is very long for the Synapses 2.
If you want really much better, than look into Advanced Listening Audio Cables, and you probably reached the end of the search for cables. It is build in Germany, so I don't know if the cable can be fitted with the right wallplug.
With kind regards,
Countguarneri