QUOTE (N.E.A @ Oct 10 2009, 08:00 PM)

i do not have a clue

Then why post? I said it before, but seriously, what is it with you and your ocmpulsion to post in EVERY topic, regardless of whether you have something to say.
On topic, I would say go with 3.5mm if you want best sound quality, cause then you can use a sound card, which will give you much higher quality than a crappy USB sound card (which is what is in the USB headset)
Really depends on what you are doing, if its just for chat, sure USB will be just great, but if its more, like gaming or music, 3.5mm EVERY day of the week