I haven't seen Haruhi, but I would assume by "killing Haruhi" it would be Endless Eight. I've heard things.

Personally, I don't think I've watched an anime that surpassed the manga, and I'm pretty sure I haven't seen any that even equal the manga. The only benefit to an anime is fight scenes, and those are done well enough in manga to not make up for everything else lacking.

______________________