If you want a lusher sound from 2A3 invest in a pair of dual flat plate 2A3's.
Mine are branded Ken Rad with blackened glass from just above the flashing to the top (wide) edge of the tube.
NOS have a tendency to measure higher than most other 2A3's - like just above 80 on a TV-7D/U (my engraved base Visseaux 2A3's also measure about that).
DeKay