Sennheiser 161's for me
http://www.sennheiser.com/comm/icm_eng.nsf/root/500582 paired with Creative xi-fi gamer card (no problems with the software).
Excellent mic and headphones, comfortable after a looong late night/ early morning gaming (ie when you hear the birds outside cheeping, you are bloody cold- you have "the claw" from overlong use of mouse, and you know you are in deep pooh with the missus when you try to creep back into bed!!)
Wavy how are the wireless sennhessiers? mine are cabled- but the cable is 9ft long so not an issue ATM- but I might be tempted to replace them with the wireless ones when they die!!