I'm possibly going to build a WE91/2A3 amp from a friend's plan (currently in the mulling over stage), and would love to hear your impressions of your Angela 91/300B amp. What prompted the change to the 6SN7, and what changes did you hear as a result?

This new amp will drive a pair of Audio Note LX Signatures - 98dB efficiency, silver voice coils, external xo's consisting mainly of copper foil caps - about 20lbs worth!