I just finished reading Alan Moore's 'Watchmen'... possibly the only person on the planet to have not sung it's praises until now.
It just pips 'The Adventures of Luther Arkwright' in my books. You just can't go wrong with that 2000AD lineage... if there be any graphic novel skeptics on the forum, do yourselves a favour and buy 'Watchmen'.
The artwork is old school mainstream - bold and bright - beautiful but heavily ironic. As for the plot and the themes, could go on for hours, but it shatters the conventions of 'masked vigilante' folklore and digs quite a bit deeper..