I prefer vim because it is much easier on my hands, but I keep going back to Emacs - mostly because of Auctex.
hanumizzle: Out of interest, is your preference for XEmacs political or feature driven? I have only played with XEmacs very briefly.
Mostly feature driven. I don't see the big deal because I can have the source for both of them. I certainly don't consider RMS an ass.
In any case, Vim LaTeX
may be what you want, however.