Please forgive me if this has already been mentioned, but I didn't see it anywhere. There are two English dubbed X-Men anime series on the G4 network. One is X-men - http://www.youtube.com/watch?v=T2jTogBrWrA
The roster includes Cyclops, Wolverine, Emma Frost, Storm, Beast, Professor X and Armor (alas, no Nightcrawler
). I'm not all that fond of anime, but this is pretty good. It is definitely the most adult animated X-Men I've ever seen, and I particularly like Storm, although she sounds a little odd since they have made no attempt at an accent.
There is also a series that is Wolverine-centric, taking place primarily in Japan. http://www.youtube.com/watch?v=sLYjywXyyDI
You may find this worth checking out if you can get it. I have AT&T U-verse, and I believe it's on Comcast (Sorry Direct TV people, but I think this network was dropped).