What Alderaan said.
I don’t have many other suggestions.
Stating who we are and the site’s original purpose of getting the unaltered’s released on dvd, and why that’s no longer enough, is indeed a good idea.
Maybe something to the effect of “we speak not only for ourselves, but for the many other fans around the world who would love to see the original versions restored.”
We might even want to appeal to their sense of responsibility over owning a piece of our cultural history. Film materials do eventually deteriorate. Just look at what happened with John Wayne’s The Alamo. Saving Star Wars, as zombie named his site, is ultimately what this is all about.
Oh, and I still think it’s worth saying “all versions” and not “both.” Even if we’re not going into detail about it in this letter (and we probably shouldn’t, it risks muddying the issue), saying “all” at least subtly reminds them that the '97 version never made it past laserdisc and that the '04 edit is stuck on dvd. Maybe a quick mention of how these movies have now been revised multiple times and that every fan has their prefered version. The “movie we grew up with” might be '77 for one person, '97 for another and '04 for someone else.