The immediate 6...c5 is still thought, more or less, to be Black's best reply to the Saemisch King's Indian.  6...e5 is certainly playable as well, but I personally thing that it plays into White's hands a bit--White's play is easier here than in other lines. 

For a less popular alternative, I'd recommend Byrne's system, ...c6, ...a6, and ...Nbd7, which is very flexible.  Black can strike out with ...b7-b5, ...e7-e5, or even ...c7-c5 depending on how White plays.

6...a6!? is interesting as well, when you can choose a Panno, a Byrne, or some kind of ...c5/Benkoish line depending on what White does.

hello,
i have been building my black repertoire against d4 and found out that i like most of the positions except for the panno against the saemich! (which is the recommended line in most of the books against the saemich) and the similar variation against the fianchetto lines by white.
Nc6, a6, Rb8, b5 ...
i just dont feel comfortable playing this plan ... so is there any other GOOD alternative that black has at his disposal ? e5 used to be popular but not anymore, any reason why? and if not e5, then what can be played?
thank you in advance for your feedback!