I recently purchased 18 Western Electric 300B tubes for my mono amps and DAC. I have not placed them in my DAC but I will tell you they were a major improvement over the Gold Lions that I had in my Canary Grand Reference Mono's.. Way better bass and vocals and separation of instruments. Drums were more pronounced.
Why not just buy both sets? Take the plunge. You only live once and you are building your own.
Why not just buy both sets? Take the plunge. You only live once and you are building your own.