003, lol - That statement is pretty vague. What do I need to know about 5.1 Surround Sound Headphones? I'm not into hi-fi recording and don't need studio headphones.
All I know is my Zalman Theater 6 5.1 headphones are not sh!tty.
They are fantastic for gaming, "BF2" I actually like using the headphones better then my z-5500's. The positional sound seems much tighter and direct with the headphones. It feels more realistic. I guess that's because the sound waves reach your eardrums much faster. I'm not going to pretend that I have "extended knowledge" about audio, but I certainly know what sounds good to me.
Not just games, but movies & music sound great too.
The only thing I hate about them is they don't have a MIC attached to them. Which is ok because I use another mic which is very good. And the only time I actually use the mic is in clan wars.
Oh by the way, "DJ-CHRIS" would be the TF member to talk about head phones with. He's got a great knowledge in the audio sector.