Just the fact that Lelouch has the Brass Balls to call out the Central Forty Six on their actions as an organization is awesome in and of itself, and the debate/lawsuit that follows really brings Lelouch into his true element, but it's his final statement that really brings it home in the Large Ham Chewing the Scenery fashion you expect to come from him.
Lelouch: "We, the Gotei Thirteen are the heart and soul of the Soul Society. All I see before me are some old geezers that do everything to undercut our power. The only ones who should shoot are the ones willing to be shot at. The only ones who should lead are the ones willing to be led! THE ONLY ONES WHO SHOULD JUDGE ARE THE ONES WILLING TO BE JUDGED!"