The answer to merit can only be answered by you after listening in your own system, because each of us has our own idea of the investment/improvement value scale. Almost everyone will tell you the Epiphany is a better sounding cord than the less expensive Electra Glide cords, but only you can decide if it's worth the extra expense.
Also, in my system, changing power cords on my preamp has the least effect of anywhere else in my system. The greatest effect of power cord swapping in my system is realized on the source and amplifier.
Also, in my system, changing power cords on my preamp has the least effect of anywhere else in my system. The greatest effect of power cord swapping in my system is realized on the source and amplifier.