Quatrofil and Valhalla are awesome, friggin supernatural.
That said, if your system is already overly bright these might not be the ones for you.
Oddly, I found that I can be happy with cheaper speaker cables (Analysis Plus Oval 9 work fine in my system) but no interconnects I've tried come close to the Quatrofil. I don't know why. I have had good success with Goertz Silver Sapphire and Harmonic Tech Silway II at a fraction of the cost of Quattrofil but at used prices I prefer the Quattrofil.
Art
That said, if your system is already overly bright these might not be the ones for you.
Oddly, I found that I can be happy with cheaper speaker cables (Analysis Plus Oval 9 work fine in my system) but no interconnects I've tried come close to the Quatrofil. I don't know why. I have had good success with Goertz Silver Sapphire and Harmonic Tech Silway II at a fraction of the cost of Quattrofil but at used prices I prefer the Quattrofil.
Art