What is the best martial art/self-defense?

I hear Brazilian Jiu Jitsu and Krav Maga are superior.

Anyone who did not say Krav Maga fails. Krav Maga works amazingly against all kinds of martial arts, especially people with no training except maybe football and wrestling in high school. You can learn it in about three weeks, and have the power to kick ass. Study it for a year, you have the power to kill. Three years, you're level 5, and you have the power to kill instantly and teach others to kill.