how would one know if one's re-20 needs a refurb? i read recently that if, when shaked, it has a small rattling sound as though there are tiny grains inside, well by golly it's refurb time. yes? no ...
Every voice is different, of course, but I always come back to three mics in my studio: the Sennheiser 421U, Sennheiser MKH416 and the Electro Voice RE20. No mic is for everyone, but these work for me ...