Most Musical 6NS7 tube for a Preamp?

Chorus-
I own a Pass X-25 and a Supratek Sauvignon. I also have a LTA MicroZOTL Mz2 on it's way.. should be here by Saturday. In talking to Sean Casey of Zu, he also has a high regard for the Pass HPA-1. He used the XA-25 and HPA-1 together at a number of shows. It doesn't matter to me about being a Headphone amp. I have a Mytek DAC that has a volume control for the Digital side. Since you're up and down when playing LP's I figured it doesn't matter. The best preamp I've heard so far with the XA-25 is the Dodd Audio Battery unit (not the passive unit) that an audio friend of mine owns. The idea of shoving him out the door and claiming I'd never seen him before, definitely crossed my mind. If your interested in some comments/observations between the two, I'd be glad to share.

Patrick 

The reason I bought a MicroZOTL Mz2 is because there is a reviewer that claimed it sounded very similar to the Dodd.

How about an Aric Audio Motherlode pre-amp
https://aricaudio.com/tube_gear.php
You could even discuss which Brand of capacitors, Resistors and many other components if you know what you want or like

I recommend the Shuguang Treasure CV181-T/6SN7.
I use them in my Don Sachs preamp. Lot's of resolution top to bottom, meaty and musical...it’s also quiet and reliable. I think it looks great too.

But don’t take my word for it. Don Sachs has every holy grail version of the 6SN7 tube and he says this one kills every one of them.

Apparently the newer Shuguang WE6SN7 is a little bit better. I have listened to this one too but not long enough to hear the difference. It sounded just as good to me. It is a bigger tube and may not fit in all applications.

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I've tried a bunch of 6SN7s over the years for the driver in my monoblocs.  Finally settled on the Psvane Globes from Grant Fidelity. Initially bright, they took 20 hours and more to level out and open up. They are excellent with great transparency and tone.