... in that case then, obviously you'll be wanting to aspire higher than entry level beginners mics,
even though most are capable of very respectable audio quality.

Certainly if the emphasis is on recording the warmth and nuances of stark naked vocal performance

I think I'd want to begin by looking at and comparing some of the more affordable valve / tube mics ...

eg, Rode probably still market a well respected moderately expensive valve mic & transformer kit....