I've always loved this arc--part of one of the best periods for the JLA ever, in my opinion--even though, as a Radical Subjectivist, I'm a little pissed off by the whole "Oh noes, suddenly reality is determined by the beliefs of the individual!", since that's how I believe reality was already working all the time, magic lasso or no. I agree that Mahnke's art is fantastic, and as someone has pointed out, it's great that Diana actually looks Greek for once.
However, one of my favorite moments in this story is also one of the smallest: Di's reaction to Plastic Man peeping. It's entirely too common in comic books to have some man get caught peeping, either intentionally or accidentally (more of the latter in manga, but still) and have a woman totally freak out on him, calling him a pervert and so on. Now, it's entirely inappropriate and unacceptable for a man (or anyone else, for that matter) to violate a woman's privacy and safety by observing her body when she's unawares; in point of fact, it's a form of abuse. But all too often, the reaction (as exemplified frequently in comics by characters like Huntress or Power Girl) is that it's not the behavior that's wrong, it's the very fact that the peeper is sexually interested in women that's wrong. This strikes me as a problematic view, because it shames the perpetrator for their own sexuality rather than for inappropriate behavior, which contributes to a culture of sexual taboo and distaste for our own physical desires which actually makes sexual violence more common, because there aren't as many safe, consensual ways to discharge those desires without being shamed for them.
Diana doesn't go that route, though. She makes it very clear that the behavior won't be tolerated--and when the fucking Goddess of Truth tells you she'll kill your peeping ass, you know she's not just funnin' you--but she also acknowledges that the act of peeping has a certain value for Plastic Man that is not, in itself, necessarily wrong. "If my body were the last thing you ever saw, would it be worth it?" She knows her body has the ability to bring pleasure to others--c'mon, modest as she is, she's got to at least know it--and while she won't tolerate anyone using her for their own pleasure against her will, she also acknowledges that someone is naturally motivated to do something pleasurable. I personally feel that her offer there is genuine: "If this gets you off, great, that's your business, and as long as you're cool with me throwing you into the sun, I'm cool with you having your few moments of fun." There's a certain openness to Plas's sexuality, even as she sets a firm and appropriate boundary against it, which strikes me as both incredibly mature and extremely Diana.
Props to the author. That would have been an easy scene to write some other way, but I think writing it in the way it was written not only gives the readers an example of a woman who is much more mature and confident in herself, even as she makes it clear that she won't tolerate abuse, than the typical poorly-written shrill accuser, but also sets Diana apart from other comic book heroines in her poise, mastery of herself and her surroundings, and her general awesomeness.