The original is always better, other versions maybe be good but it could never do justice to the original. I think, all singers are perfect. My favorite is Daniel Lavoie, at first I didn't like his voice, but then... He has such metal, cold voice, but sometimes gives such gentle notes, that it's just break your heart. All others are perfect. I can't find right words :) But I must say, that Daniel Lavoie and Garou not just singing, they are telling a story with their voices.
In live version I was a litlle disappointed with Helen Segara, she has a stone face, but she sings good. If you want to buy, just buy it, you will not regret. It's not just a musical, it's something beautiful and undescribable.