Condenser mics are supposedly the best, but they're also the most expensive and fragile. I dunno how familiar you are with them, but they gotta sit in a shockmount usually. Don't expect to take it to gigs or practice without risk of damage to internal parts. I'm a poor man, so I've only had limited experience with them in a college studio. On the other hand (and continuing the previous recomendation) Shure makes the SM-58 vocal mic. It's basically a 57 with a vocal screen and slightly tweaked frequencies, but with the same durability and reliability. That's not to say you couldn't use a 57 for vocals though. That mics selling point is that it's been on the President's podium for 20+ years or whatever. It's also called the workhorse of the road and studio, since you can use it from vocals to snare drums. So in the end, if you have no mics at all right now, get a Shure SM-57 to start your collection, then expand.