It definitely depends on your own individual voice. The SM58 is good for male vocals and females who don't have high voices, however my voice is quite high and clear and the SM58 doesn't suit it so well. It gives a lot of warmth in my lower register but where my range is naturally strong the SM58 doesn't pick it up very well. I use an Audio-Technica ATM63. It isn't as warm, but is strong in the range where my voice is strong, and gives a sound more like how I think I "really" sound (i.e. when singing unamplified).

The SM58 seems to have become a "standard", it is very robust and sounds good or at least okay for most singers. My husband sings with one, and before buying he tried half a dozen different mics (AKG, Beyer, Audix - can't remember the models) but the 58 sounded warmest and smoothest for him.

I would recommend you try a selection of mics and see what you like the sound of for your voice.