also agree with steve. get good quality headphones, around ear and light so they comfy for long periods. i have a pair of Bose (triport), picked them off bestbuy for $90. they're light and around ear, but construction is a little lacking. but then you can also take them out in public with your select music device without your flippin mic. thats what i would do.
then i just use the built in mic in the laptop.
otherwise, i'd get a sennheiser combo headset.