Ayon has the best build quality and transformers, chokes which is the heart
of any tube gear which they use world class Lundahl.
and the only brand I know that uses a microprocessor to monitor and adjust each power tube , plus a machined Aluminum case not sheet metal like most ,
much lower vibration ,all tube sockets gold over Copper the best conductor
for the tubes and well as connectors, Mundorf coupling capacitors .not much competition at its price point , which I have bought 3 of their products.