Superman - The Animated Series
I picked up a copy of Superman - The Animated Series, Volume One this weekend. It's a great series and there are a ton of cool features to go along with this DVD set. It includes the first 18 episodes (of 54 total). We've watched 1 though 4 so far. There are 4 episodes with commentary and one episode has a pop-up video thing going with interesting little trivia tidbits. I bought it up on a whim for 20 bucks and I think it's one of my favorite DVD purchases ever.