Cardcaptor Sakura Animax dubs are way better than US dubs. Atleast in the Animax Dub, the girl who has given sakura's voice seems to be in the same age range. The US dubs makes her feel like she is in her 20's.
Another good animax dub is Slam Dunk. Haven't seen the american dub, but have read a lot of reviews comparing them and no one likes the US dubs.
Then there is also Inu Yasha. on animax, the people behind the dubs really seemed to like the series. And the people, fit exactly in the roles they were given.
Also, Shonen Onmyoji has a better dub on animax than the US dub.
Watch the first episode of each series and you will know what I am talking about.