5.1 headphone sets are not very good sound quality at all. I've tried a few of them when people told me that "these will change your opinion". And trust me, I tried to like them...actually I wanted to like them...but my $40 computer headset blew them out of the water.
Think of the as the Bose cubes of the headphone world. Lots of "wow" fator, but little beef under the bun, if you get my drift. There'a a whole slew of reasons, from teh smallish drivers used, causing bad frequency response...down to the way the drivers are spaced does not allow for a surround effect anywhere as good as any $250 home theater in a box.
If you get a nice pair of standard phones, you'll find that the sound quality will make the movies far more enjoyable.
If you insist on 5.1 headphones, Zalman makes a pair as well as a headphone amp designed for them.....they were designed to either run off a 5.1 computer soundcard or use a special amp...that's the only ways to run them.
