Premiere. But WMM works. Even though a lot of people bash WMM because it sucks(which it does) if you know how to work it, it can make really good AMVs. . . Just lacking in the special effects department. . . Anyway, you might want to try some of the Pokemon threads going on. Espiecially
This one.(It's a direct link to the 2nd page, however).
Pokemon is an underused anime, and it would work great fro some AMVs, espieically if you used some of the movies. Also, if you hang around this forum, a lot of people are giving out free ideas. Hence subject titles reading "Free Idea of. . ."
So good luck with you.