I have to agree with the seperate desk mic and good headphones. I have a $8 labtec mic i got from newegg.com sits about three feet away from my head and noone has ever had any trouble understanding me. leaves me free to use whatever headphones im in the mood for at the time.
http://www.newegg.com/Product/Produc...82E16836111208
Thats the mic i use its dirt cheap and has been hanging from a lamp next to my moniter for about a year and a half and been working flawlessly. No reason to deal with having a mic right next to your face. Better off spending money on some good quality headphones then a headset.