"As for the W-5, its contemporary wasn’t the 860A at all. It never was, nor the W-7 either. The W-5 morphed into the W5.3, using the same circuit but a bit less power, however, additional sonic refinement. After that it was completely discontinued."
Costa Koulisakis
Simaudio Ltd.
Wouldn't the W5 contemporary/equivalent be the 761 priced at $14k?