And yes, the Dini+Timm Batman is truly glorious stuff. Heck, even their Superman stuff that doesn't involve him wearing dorky spacesuits has some good moments, though the best serious Superman either involves Batman (World's Finest), or has a darker Batman feel to it (The Late Mr. Kent).
I quite enjoyed a bit where I saw a knock-down, drag-out fight between Superman and Capt. Marvel. A glorious slugfest in the best Marvel style between Earth's mightiest mortals that destroyed a bunch of buildings.
Fans of the JLU show often complain very loudly about the inconsistent treatment of Superman's powers and his also-ran status. That and the fact he is often beaten up by second-rate villains and acts like a dumb jock. The fan-favourite on the show is Hawkgirl. Go figure.