Vocal mic that can't go wrong? No such thing. There is no vocal mic so good, or so expensive, that it can't make somebody sound awful. The worst thing? There's *no way* to predict what will work, either for a specific voice, or a specific context. If there was such a thing, major studios would not have multiple main vocal mics. They'd just have one. There's really only a few things you can do. First, never miss a chance to sing through a mic you haven't used before. It might be the holy grail, even if you didn't think it was for vocals. Two, buy mics that work for a lot of other people. Three, buy respected microphones that you find on the equipment lists of major studios. That way, if it doesn't work put for you, you lose less when you re-sell it. Also, if it's on the equipment lists of lots of studios, you can be pretty sure it'll be good for recording *something*, or all those people wouldn't keep it around. I generally recommend a top dynamic and a good cheap condenser. Not many people can afford a top condenser. For dynamics, I would recommend:
Shure SM7b
Electrovoice RE20
For condensers, I like:
Marshall Electronics MXL V67G
AKG C2000B
B.L.U.E. Bluebird, and Baby Bottle
Neumann TLM102
Oktava MK319
Rode NTK
The mics above range from $100 to about $700 new. While none of the listed condensers is actually a studio standard (the dynamics *are*), you will find all of them on the B and C room lists of a lot of studios. I wish I could tell you what you want to hear- that there's a perfect universal vocal mic, *BUT THERE ISN'T*! Good luck-Richie