Zabuza was done by the guy that does Spike Spiegel's voice, only done much grittier and deeper, so I'm glad they got a well known and destinguished dubb actor. The way I look at the dubb is, what would I think of it if I've never seen the subb? When I think about it like that, I realise that I wouldn't even think about it being a bad dubb. Sure they don't sound like american versions of the japanese actors, but do you really have such unreasonable expectations? I'm betting the first anime you ever saw was dubbed, and it wasn't until much later in your anime viewing life that you considered watching subbs, right? Well think of this dubb as just a way to get people who are still new to anime to gradually ease into the hard core stuff. If I'd never seen the subb, I wouldn't mind the dubb.
Before the world was created, the Word already existed. The Word was the source of life, and this life brought light to mankind. The light shines in the darkness, and the darkness has never put it out.