I don't really like any of those slogans. A slogan should have a certain tone, and right now all that's being conveyed, at least for me, is the felling you get when watching a cheesy infomercial. It's not good. Barbelith has some great board descriptions that convey, again, at least for me, a slightly sassy but tasteful tone:
Comic Books
Graphic Novels and Comics - superheroes to social-commentary
Radio & Music
From Bowie to Britney, punk to Daft Punk
Gathering
Organising gatherings - unlawful or otherwise
I think someone suggested it in the other thread, but "We kill people for fun" seems like a very good slogan, as long as it's not overused and pasted everywhere the word Nexuiz shows up. In any case, it'll be best to have multiple slogans.