Young Justice, definitely. It was a tough call between that and Spectacular Spider-Man (hey what a coikidink! both Greg Weisman shows), but with YJ I just felt there were more places the show could go, and more stories that could be told in the universe. It's a shame cartoon network is run by idiots that the cancelled both this and the spectacular Green Lantern.
Jeph Loeb's Superman/Batman run is actually one of the first comic series I read, Greg Pak is a fantastic writer so I may give this series a whirl. Hopefully it will have more of a fun tone that the other superman and batman books.