If you and find it, I recommend ACTION COMICS #775, a story called WHAT'S SO FUNNY ABOUT TRUTH AND JUSTICE by Joe Casey. It's one of my favorite Superman stories of all time, because it deals with Superman facing a group of "modern" heroes that just slaughter criminals, but have massive public support... which causes Superman to question if his old fashioned morality still works in a modern world. Visually, it's spectacular, and it deals with the concept of superhero morality and what it represents. The same theme is repeated in the CRISIS storyarc, in which Wonder Woman snaps Maxwell Lords neck as the only solution to keep him from controling Superman again in the future... this creates a rift between the big three, Superman/Batman/Wonder Woman, because Wonder Woman isn't a superhero... she's an Amazon Warrior, and this is how she deals with problems, so she doesn't see what the big deal is.