A few posts up I mentioned issue 1-26 of the first volume (1990) being an awesome run. It was released in an omnibus a little while back, but you can probably pick up the single issues for about a buck a piece. It was a series that was doomed to fail because it was just a bunch of odd teen characters that previously had nothing to do with each other, but it succeeded because Fabian Nicieza cared about the characters and Mark Bagley (in his first monthly gig...I think) drew the hell out of it.
If you are a Justice fan you will love his character arc in those issues.