The sm58 is good for live work or miking guitar cabinets but it isn't the best sounding mike for recording vocals although it will do.For recording vocals a large diaphragm condenser mike of which there are many competing brands around now will sound much better the Rode NT1 (a reasonably priced example but is a cardioid pattern as is the SM58) is a favourite of many home studio users but there are lots of other brands to choose from.Rode have also recently produced an NT3 small diaphragm condenser that doesn't require phantom power and no I don't work for Rode.Condensers always have a much more detailed sound than dynamic mikes like the sm58 but are generally not so robust(in other words don't try a Roger Daltrey act with one).If you want your vocals to sound their best go the condenser route.