Having 40 years in Audio I speak by experience.
by far the best value as well as quality are the hand built SET 300 B amplifiers
by Vacuum tube Engineer,designer Radu Tarta . You would have to spend 3-4x
as much $$ money to = his build quality ,and sound ,His Great amps start around $6k using the Excellent Lundahl transformers,and chokes ,and side panels and top plates he has custom built to any standard ,and powder coated with beautiful solid wood front and side panels.