From what I understand, it makes a bit more sense in the graphic novel, which made a much greater impact when I read it in 1995 than neato matrix graphics ever did. V doesn't have to die for his goals, but for Evey, it's a bit of the final test, to see if she really has let her past modes of thinking go. By forging the ideals (V's hopes to take down the government to a point of accountability) within the heat of curiosity (Is V her father?). The book, in a sense wasn't about V, but about V's effect on people, and what that effect does to them. In that sense, it was perfectly logical for V to die; he'd accomplished what he set out to do; he was the last bridge to be burned before the populance could take it as they would. He was merely there to open the door to the everyman (Evey (thus her name)), but it was their choice on to whether they stepped through it.

Does that make sense, or am I just hallucenating due to the flu medication?

Of course, if Alan Moore had his way with it, the movie would have never been made, and the book would have gone out of print ages ago.