Master no louder than -9 LUFS short-term at the loudest moments
(with True Peaks no higher than -1)
That's what Ian Shepherd says at least.
SimulAnalog guitar suite has a pretty decent Univibe free VST plugin.
Fantasizing about building microphone(s). The Schoeps circuit seems to be the way to go. It's a simple circuit but it weirdly has a lot ...