You should check out this website.
http://www.avsforum.com/forum/173-2-...philes-41.html
Those forums may eat up more time than you are willing to put in for just headphones because of the info overload but they have the best info on anything to do with home media.
I got some really nice headphones that were suggested on that site when I was looking for somethign to use with my theater room but they aren't for gaming (no mic). I still used it for my PC some because they sounded so nice but I mainly got the headset so I could crank the volume up late at night without bothering my wife.