Best surround headphones?

http://www.newegg.com/Product/Product.aspx?Item=N82E16826106392

These Sennheiser's look pretty good. They are kinda pricy though...

Without a doubt the Speedlink Medusa 5.1 headphones. There are several different models now, but they are all pretty similar. Just pick the interface you want.

I had to have mine shipped in a few years ago from the UK to the US, but it was totally worth it. They are great. I am not sure what kind of availability they have nowadays here.

EDIT: Well look at this. A U.S. website! Nice. I may have to buy another pair.

This doesn't need 5.1 headphones, but it surround sound and it's pretty wicked:

http://www.youtube.com/watch?v=IUDTlvagjJA