Interesting. Of all the Legion and all the Superman stories, that they would have picked that one. If going for Johns' stuff, I'd have ranked "Superman and the LSH" higher. Maybe the Perez art made the difference?
Yeah, I prefer Superman and the LSH too - I'm guessing the "crisis" tie-in didn't hurt. It seems like this list was pretty split between "cross over bonanza" and well-written tight issues/arcs.