Most Musical 6NS7 tube for a Preamp?

I sold my AI L3.
I want a preamp that makes everything sound better not just be invisible.
Is this unreasonable? 

From what I am hearing its down to three choices:

-New Supratek Chardonnay $2-$2,500
-New or used deHavilland Ultra $2,500 + or -.
-Used Audio Note M2 $2,500 or so.

Thank you all so much for sharing your experiences
with the gear I need to decide on.

You must try 2c22 (7193) tubes with adapter. You need two for one 6sn7. Imho the best solution for 6sn7 preamplifiers.

One more vote here for the Don Sachs preamp. You won't regret it musically, and it is perfectly in your price range. Also very easy access for rolling tubes.

I would look for a Rogue Audio Magnum 99 pre and then you can roll all the 6SN7's you like. I tried them all and some of the variants are just better. I went from the 6SN7 to the 6F8G's and then to the 6J5GT's which will require and adapter, these are by far the most linear of all....

The word musical means different things to different people. It’s just word. There is a very large audiophile vocabulary for sound which oft goes unused. Anyway, you can’t go wrong with Sylvania NOS of almost any type, Chrome Domes all the way up to ‘52 Badboys. Then, more progress can be yours for the cost of Herbies tube dampers. They’re gold, Jerry, gold! All tubes are microphonic, even ones that claim ultra low microphonic. And two dampers are better than one, one of the glass at the level of the getter the other on the base. 🤗 Yes, I know what you’re thinking, “but don’t two dampers cost more than the tube itself?”