Turtle Beach Tangos. Depending on your price range and personal preference Turtle Beach or Astro headsets would be the way to go.
I use Logitech Z906 and the sound of BO2 is pretty awesome except for the footsteps. I also have the Recon 3D external soundcard paired with an Audio Technica AD700 and a generic mic.
The external soundcard is plugged into my PC via USB and is connected to my XBOX using an optical cable. The sound is cinema like and it's better than any Turtle Beach headset I ever tried.