What microphone depends on the following:

1) live performance or studio recording

2) male/female vocal

3) type of music.

4) condenser mics require phantom power (48V)

5) How much you want to spend?

Can you describe in detail....

What and where and how are you recording the vocals? Are you using a mixer with built in phantom power?

Finally, whatever you choose, make sure you go to a music place that allows you to try them before buying them. That is the most important advice I insist on.