The Valhalla as being the "reference standard" is fading, IMO. Many lower cost brands are besting it. Even Nordost is realizing this, see Nordost News:
"Nordost is pleased to announce the release of the newest member to the micro mono-filament cable family! The Valkyrja has a lavender mono-filament wrapped around each individual conductor yielding the nearly the same performance as its predecessor, the Valhalla at a fraction of the cost. Through extensive redesigning techniques, Nordost has been able at long last to create a series of cables quite comparable to the Valhalla, while keeping the costs at a minimum."
"Nordost is pleased to announce the release of the newest member to the micro mono-filament cable family! The Valkyrja has a lavender mono-filament wrapped around each individual conductor yielding the nearly the same performance as its predecessor, the Valhalla at a fraction of the cost. Through extensive redesigning techniques, Nordost has been able at long last to create a series of cables quite comparable to the Valhalla, while keeping the costs at a minimum."