Mullard EL34 that sounds best

@inna my Mullards were not matched Quads.  I was able to buy matched pairs to make one quad.  Another quad I purchased was sold from the demise of an amp.  They tested very close but one of the tubes was a Matsushita not Mullard.  (Matsushitas look very similar and were made at a factory in Japan using Mullard tooling.  They sound good not great to me).  I was able to find a single Mullard with the same codes and test values.  Took a little bit of buying and selling to get the quads together.
I agree the Gold Lion KT77 are excellent.  They are my favorite new stock EL 34 family tube.  They just don’t have the soul/tone that Mullards provide.  The Mullards just sound better to me on my system.  

tksteingraber, a lot of work and some luck.

I just see no reason to switch from SEDs to anything but vintage Mullard.

Yes, soul and tone.

Does anyone have experince with Groove Tubes NOS GT EL34-Ms? Availible through Watford Valves in Great Britain at about $60 per shipped.

I heard someone say they are greta and a steal. I have no personal experience.

Are they Chinese tubes ?

Matched NOS quads would be very, very difficult to find.  But check with Brent Jesse.  He sometimes has slightly used Mullards XF1 and XF2 pairs advertised for around or even less than $100 per tube.  Who knows he might be able to come up with a quad.  I’ve never purchased EL34’s from him, but what I have purchase has always been as advertised.