The Western Electric's arrived today. So here is an initial view, I am not very good at explaining this stuff but I'll try.
I am using a Tron discovery & Tron Seven pre. Speakers are Avantgarde Duos.
I started out with EML 300b's (standard ones) based on the recommendation of the amp designer and used them for about 1 year, when I got the takatsuki's last September they really improved everything better/higher treble, deeper tighter bass. They seemed to bring out more detail in the music. They were definitely a worthwhile upgrade.
The only negative I would have for them was that on one or two songs, there were a couple of sections when listing with the EMLs that they had that magical creamy texture to the music, the kind of thing where you get goosebumps from listening to it and how great it sounds (e.g the guitar part in a kings of convenience song called 24-25 at about 2:30 was one of them)the takastuki didn't seem to give you that magic on those songs but improved everything else.
Going from the takastuki to the WE's that magic is straight back but its so much better it is there on every song! It has the same bass extension as the takastuki's but it isnt as detailed as the takastuki. They are very musical and engaging.
I'm really enjoying going through all my music and re-listen to it with these tubes.