Speaking of the original, it's one of the two movies I have on BluRay.
Watching it again recently, I was surprised at how closely the newer movie follows it, beat for beat. Aside from a few aesthetic changes (no Mars, no mutants) it's basically the same movie.
So much for those of us who thought it was going to be a closer adaption of the book eh
And I agree with Roger Ebert's review, Arnold's version has much more heart in it.