Tubesnstats,
I've tried many 300bs but not the original/vintage Western Electric (just too expensive to fool with). I did try the reissue Western Electric but it wasn't impressive in my amplifier. As much as I enjoyed the superb Takatsuki I must say that the Elrog surpassed it in my system. The EML XLS and Takatsuki battle tit for tat as both have many virtues. I don't know how much stress your preamplifier places on the 300b compar
ed to power amplifier duties as required in my system.
If the reliability issue is truly solved then the Elrog is one of the
finest tubes ever produced IMHO.
Charles