Best DLC for Borderlands?

I've just bought Borderlands and was wondering what everybody considers to be the best DLC available?

I purchased a bundle of Moxxi Underdome and Ned Island but have not received it. They were the first DLC's but without having played them I know Gen Knoxx will still be the best, because of the Crimson Lance and the relation it has to Roland--my guy. There is one more DLC due out next month about Claptrap and I'm looking forward to that, but you won't know anything about it till you beat the game and I'm not tellin'! All I can say is be nice to the Claptraps! ;) So even without playing the other DLC's I KNOW Gen Knoxx is my favorite. Roland is hot!

Zombie Island of Dr. Ned definitely. I've played all three DLCs and Zombie Island was funniest of all. Plenty of zombies to shoot and really cool storyline!

Second one suggested would be The Secret Armory of General Knoxx, has some cool quests and main storyline is good, but also has vast landscape so you'll get bored to death going from one place to another (and you'll have to do it a lot).

And last would be Mad Moxxies Underdome Riot - pretty much an leveled arena with distinct Borderlands sense of humor and random mutators during battles. Funny, but no storyline or some other cool features.