So much of life is counterintuitive. In my work, one of the prime examples of that it the mistaken believe that the key factor in being a voiceover talent is the voice. Just because someone has the money to guy a Guarneri doesn’t mean he or she can debut next week at with the New York Philharmonic playing the Sibelius violin concerto.
Having a nice voice certainly isn’t an obstacle to a successful career in voiceover work, but it’s no guarantee, either. By way of illustration of my point, be sure to check out Some Audio Guy’s very interesting post on How Bad Can a Voice Be?