Dragon Ball Z, Vol. 11: The Super Saiyan (Dragon Ball Z, #11) | 
pick10/10:
I mean holy crap. Goku has finally achieved Super Saiyan status while the Dragon Balls from both Earth and Namek were used in a way that saved so many lives and allows Goku to finally fight Frieza, no bars held. The death of Frieza is imminent and Goku will be stronger than ever before. The second death of Krillin will be worth it.