She does indeed have a good voice. Here's something that showcases her voice much more, though. She plays the character of Valerie Fox:
http://www.youtube.com/watch?v=mk60xrQNiLgAlso, going back to Voyager, she was actually a pretty major character in the series for the first 3 seasons or so. My favorite episode centered on her character Kes, though is the episode called "Elogium" where she goes through something analogous to a sort of once-in-a-lifetime heat. There's this scene where I swear you could close your eyes and think she was Vitani talking about Scar:
http://www.youtube.com/watch?v=fXT7R3jPZ0k