A lot of people have talked about the Shure SM58. It is inexpensive and it is so common that the sound signature is easily recognized. So you get a 'classic' sound boost by going that route.
Rather than argue I'm going to concede that point and just call it a 'standard' from which to start your search. It's cheap & safe. Like so much in life that can also sometimes mean "boring". That is of course a personal choice.
The original question was specifically about clear vocals sung to metal. There have been many good suggestions, but mine is the Blue enCORE 300. For clear vocals with good gain it simply performs. My only complaint is the strangely mutated cardioid pattern [http://www.bluemic.com/encore/images/30 … -image.jpg]
Someone suggested the Blue enCORE 200. They are quite different and I would recommend trying both so that you understand the difference.
I read someone else on the list asking about what to rehearse with in a small room. My advice is a preamp & some headphones. The VoiceLive2 is amazingly handy practice tool in this respect, IMHO...
- Jon Rohr