TADAC owners - which best 12au7 tubes?

I bought a TADAC from a fellow gonner and he had an extra set of Electro Harmonics as well as the stock tubes. Both sounded OK, but I figured things could sound better. I just put in a pair of the French Mazda tubes and I am very impressed (scratch that- extremely impressed) with what they have done for this DAC. Everything has improved after putting in the Mazda tubes- soundstage, macro and micro dynamics as well as being more musical.

Before I was getting some distortion in the vocals on certain recordings I believe the term is called microphony.Please forgive me if I got the term wrong this is my first go at tube gear. Anyway the distortion is now eliminated after putting in the Mazdas.

I bought 1962 Same Dated telefunken smooth here on Audiogon. What I noticed immediately was more pronounced and nuanced bass response. Everything sounds great but without going back and forth between tubes I can't describe the differences beyond the obvious improvement in bass in the initial listening. It's so good now, I no longer long for tube-rolling.... but when I get bored later, I imagine I may give another tube a chance - just for fun.

I have some RCA blackplates that have made a big improvement over the stock chinese. Another very nice tweak is the Herbie Audio Lab dampners. I now have a much cleaner top end! The preamp ultrasonic 9's. You have to cut them in half though so they can sit on top of the tubes.

Mazda (RT/RTC) are all incredible, across all types. It's uncanny really. I have some square getter wing plate 12AU7s I can't wait to roll into my new DAC.

I am using black glass Tung Sol's, sound great! I tried them after first trying standard NOS Tung Sol's which sounded so nice and clean, I figured the black glass variant was worth a try. Yes very nice vocals and clean sounding!

I noticed after getting rid of the stock Chinese tubes that the Tubiness knob was clean sounding through all it's range, and not distorting as it was with the original tubes.