I dont think theres any headset/headphones and mics for specialized for Arma 3 based on your question, if it works on one game or anything it should work just as fine with Arma 3.
Its like asking "What is the best headset/headphones and mics for Pornhub?"
Although having a 7.1 headset might give you a slight advantage, but if you're not used to hearing different channels then you probably gonna get disoriented.