i went for the X1's as i didnt fancy having to recharge battries by the the dozen, so i can only say that no one can creep up on you in call of duty even with the standard stereo ones.
i belive the top model is full surround sound. and wireless
the slight downside i find with these headphones is the mic, well the mic;'s fine but every ones voice is piped in with games sound and on the x1's you have to get the balance of the game volume right and mic volume as you have two sperate controls for each but i find the mic volume just dosent get amplifed enough so theres a limit to how loud you have the game sound.
and the biggest of issues is make sure your son wears one of the headphone so its not completely covering his ear as i find my self shouting on the mic when i wear um unless ive got one slightly off and all so family finds it funny to sneak up on you when you cant hear nothing
i brought them for night time game play but find my self using them when ever am on the xbox now as you hear things that you cant on the tv sound. on cod you can tell where some one shot at you from just by sound and i havent been stabed in the back since get me a pair of these