I have owned a bire-wired set of Mightnight on the bottom and Midnight 2 on top for more than 7 years. Still sounds much better than most cables out now. I have tried much more expensive cables and they do not sound better. Guess I'll keep my biwired set for at least another 7 seven years.
Turned out to be an excellence investment in cables.
System:
Wadia 850 CD Player direct to
Mark Levinson 27.5 Amp
Magneplanars 1.5QR