Are Turtle Beach PX21 Headphones in Surround Sound?

I am looking to purchase a pair of headphones for my PS3 so that I can hear EVERYTHING while playing Modern Warfare 2. I have looked into the PX21's ($79.99) and it says that they ares STEREO and not Surround Sound. My questions is, will I be able to distinguish if someone is not only to my right or left, but in front or behind me in? Does it offer a 360 degree field of hearing? Thanks for the help!!