player 1,
if i could suggest this mike instead,

it has a much warmer sound
and has a larger frequency response,
and better noise rejection
better gain before feedback
only an extra $29
i've compared it to the SM58 and there's no comparison
and they do make a wireless version of it too.
google it and read reviews, and go try one out at music store...
review:
http://themodernvocalistworld.com/2011/01/23/smooth-operator-ev-nd767a-dynamic-vocal-mic-review/EV webite for this mic:
http://www.electrovoice.com/product.php?id=85