Not sure what you plan for budget on a mike, but these are all good brands that I've used:
Shure Inc. < good choice, a standard for vocalists, have pro-level under $100 (I think my church used to use the $99 SM58)
Audio-Technica < consumer line of mics, they have one of the best under $100 (
Amazon link)
Sennheiser < very high end, but loved by audio guys, amazing audio; their low end E 815 S-C (not sure on quality) is about $45
Sony < hit and miss for vocalist mics (their shotgun mics are pretty darn good)
Azden < least expensive, but quality still in the "good" range (My brother just bought of of their mics, sounds fine for speech)