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.