if your talking about the px5 there were horrible to the headphones i was using (turtle beach dss)
they sounded distant and the explosions were to loud even when i turned the bass down they lasted a week until i went back to my old setup
px3 are great headphones. i had px3 for about a week, then i got px5s. if you can get px5s, you should. i got mine off craigslist for $125. and they are great. the px3 have 8 presets and you can customize them. and they are wireless. serously no cons that i can think of.
i got the px5 myself, not the px3 not sure if that 1 even exists, and i love the fact its wireless and you can setup 8 different presets. Altough i havvnt done it yet, I'm waiting for black ops 2.. but trust me its a nice headset