DJI Naza M V2 Help


I am a newbie and trying to setup my first hexacopter. I have Tarot FY680 frame and DJI Naza V2 complete set. After bit of research, my idea is to install 35xx series motors. but i could not find any convincing information of the ESCs i should use. I mean I have an idea of the capacity, but not a compatible brand/firmware info other than manual says it requires 400mhz ESC. I dont want to buy DJI motors and ESCs and looking for alternative 3rd party brand.

Can someone help me and explain what type of a brand/firmware i should use with my Naza M V2.

Motors are 35xx with 2-6S battery. ESC??