You might want to consider investing in several different mikes - since they all offer tonal variations and characteristics - some work better for some applications, etc., and you don't always need the most expensive you can afford.
I vaguely remember reading that the old road-worthy Shure 57 - was the mike of choice for one song in particular on the Michael Jackson "Thriller" recording.

------------------
Tom Tracy
http://www.soundclick.com/tomtracy