I've heard people say that this is better than the movie, but it just wasn't close to me. Maybe it's one of those cases where whichever one you're exposed to first makes an impact, but key points that still have punch in the movie just fall flat in the book, and the framing device is much worse in the book.
I actually own the individual issues of this classic tale. A bit overshadowed, unfairly in my opinion, by Watchmen, I am quite proud to own these comics, and would only part with them for a considerable sum.
You could argue that V is derivative of 1984, and not without justification, but I think it brings enough that is original, both to its time and to the genre of comics/graphic noves, to justify calling it a classic.