Um... Not for nothing, but this has been done before. A few times, in point of fact. I'm not angry, but it's worth noting.
On Topic:
For my money, I'm going with either Full Metal Panic (
Panic, screw that alchemist stuff), or RahXephon. Though, I'd be remiss not to mention Hellsing, since (a) it was done well, and (b) Chrispin Freeman rocks my socks off. Other notable shows would be Revolutionary Girl Utena (accepting the lower production quality in general, the voice work was top notch), Kaleidostar (don't judge me), D.N Angel, and really anything released by ADV over the last decade or so.
Lilani said:
The problem with dubs is often humor or character personalities are lost in translation, or if someone like 4Kids gets ahold of it, they severely dumb it down for a younger audience and edit physical parts of the show out (like making one character's omnipresent cigarette into a lollipop, so the show doesn't "promote" smoking). Either that, or often the voice acting seems strained or doesn't fit the lip movements and actions well.
However, I think what they've done with Hayao Miyazaki's movies is quite impressive. Only a few times do things seem awkward with the lip movements (which, quite honestly is inevitable with the media they're working with), and the quality of the voice acting is top-notch.
It depends on the translation, really. In most cases, I've enjoyed the English dub more, especially if the localization team was worth anything. I'll give you an example (based on my watching of, and a friend's watching of, D.N Angel). I watched the dub, he watched the sub/speaks Japanese. At one point, the main character is scaling a cliff, and loses his footing. The original Japanese has him making a linguistic joke about the noise his pet makes, which phonetically sounds like the Japanese word for "steep". In the English, they Woolseyed the joke into "that was just a gravity check", which was much more humorous for me. Almost any joke based on Japanese linguistics or culture falls flat with me (for as much as I enjoy anime, I'm not really into Japanese either as a language or a culture).
A good TVtropes entry is based on this:
http://tvtropes.org/pmwiki/pmwiki.php/Main/Woolseyism