1: Naruto and Gaara, because they understand eachother and don't have to hold back beiing afraid that they will be miss-understooth, plus naruto has the best attack using the nine tails chakra, and gaara got defend naruto with his kewl sand.
And if they need to there seals got break and they can turn into freak ass monsters who kill everything in there way... maybe not a good thing but if u got ur back against the wall and there are 2 guys who can freak... that's nice

2: Sasuke and Naruto, because they allready showed there strength as a team and they have only gotten stronger and stronger so I think they wouth be one of the best teams around.