What's the best 6NS7 tube you have tried in your Atma-Sphere MP-3 preamp?

My Pre Amp to be commission designed / built by my Power Amp' designer / builder over 20 years separate,. Is  Pre Amp' Design to deliver a range of influences on the System End Sound. 

Two Tube Types are to be used as independent channels and a SS Channel is added as well.

Variable Gain is also an option I have selected. 

When it comes to Valves to be trialed, I have been very fortunate, I have a decent measured selection that extends from the 1940's to the 00's

A friend has a substantial selection of Valves from Two Generations of  collectors. 

Loaned Valves always measure above factory Spec". These are Tip Top always close matched on each halve. 

Making a change to an End Sound by changing a Tube is for everybody with a Valve to be changed

Transforming a System to one that is unrecognisable, where the betterment is judged by End Sound and Gape of the Dropped Jaw, as a result of creating a permutations throughout a system. This is a gift belonging to only a few. 

Such changes when created are imagined as being unsurpassable. 

Pindac, I can't speak for your system, of course, but I can tell you that with a little patience, you can make an Atma setup sound so amazing that people wonder how the music is actually being played live for them. And they'll be shocked when someone goes wild on a drum kit, etc. Believe me, there's nothing exaggerated about that. Or the voices can be so tangible that if you stretch your arms, you can almost touch the artist. But that, of course, depends on many factors. I truly believe that with some time and effort, anyone can deliver a performance that ranges from acceptable to truly exceptional.

I've spent a fair bit of time experimenting with 6SN7s in my MA-60.  After considerable trial and error, I've settled on Ray's select in the back outside positions (very alive and clear tubes without a hint of etch or grain), a sylvania chrome dome in the center back position (smooth and clear), and am currently running some NOS tung sols in the front position (very detailed and realistic).  I have a number of Sylvania and RCA tubes that I cycled through before landing on this combination.  I am going to try a pair of Linlai in the front positions, because why not?

I agree with revinylized that the Atma-Spheres can sound glorious with the right combination of tubes and associated equipment.  

@car123 

I haven't tried the Ray, so I have no idea or opinion about it. The Linlai fits well into my setup and what I want to achieve overall. Of course, there are many ways to Rome. In my MA-1, I've combined it with the Melz ribbed anodes (without the holes), as mentioned above. I'm experimenting with the third one. On Monday, I'll be getting a TS T-Plates with black coated anodes for a bit more rounded tones and a slightly warmer midrange. I still have a few candidates for this position, which will put me at the front of the concert hall.