Best 300B tube


Hi! I have an Audion Silver Night MKII with Tannoy Turnberry SE and a Chord 2Qute connected to a Macbook Pro with Audirvana 3.5. The Audion mounts JJ 300B tubes. I replaced with TJ Full Music Solid Plate matched pair. The middle and highs expanded, all very clear, but the sound now it's so bright that a in less than an hour a get auditive fatigue. So I got back to the JJs, thinking what's next. Gold Lion or it would be similar? Raise money for KR Audio or stop curiosity and just conform with JJs, that are not bad of course? Thanks a lot.
hectorruiz
Dave: No doubt 432Evo would be an excellent upgrade, but its price is more than EUR 11,000. 2Qute was EUR 1,200 and when I compared conneted to a Mac Book Pro the sound was absolutely better than de EUR 600 cd player that a I used before. By the other side, if Mac as a source with Audirvana were low level option, why many brands use that combination to test their products in High End events (Tannoy Prestige series for example)?
Dave...do you see a large incremental improvement if you add the EVO to the Lumin X-1?  As you know I did not hear any improvement with the EMM LAb DAC and Laufer MP.

Dave...do you see a large incremental improvement if you add the EVO to the Lumin X-1?  As you know I did not hear any improvement with the EMM LAb DAC and Laufer MP.

Sorry to the OP for being off topic.  

I do have 16 300B Golden Lion Tubes in my Canary Audio Grand Reference 2 mono amps.