doggie015 said:
I'd recommend a GameCom 777. The cushioned earpeices and headband make it very easy to wear. It also comes with it's own plantronics noise-cancelling mic so background noise is nonexistant (I live rather close to an international airport and the jet noise NEVER appears on the recordings I make of it!).
Seconded. That's the headset I use and it's really comfortable for long term use with good sound and mic quality.
Though can I have a clarification on your OP? From how I read it you said the sound just comes from the speakers (not headset), and the headset is just used as a mic.
In that case I'd suggest not buying a new headset and instead getting a good stand alone mic. That way no uncomfortable headset (because as comfy as my headset is its always more of a pain than not wearing one at all), and better audio quality for your buck. Though you may have to deal with background noise from your speakers.
On the Mic front I'd suggest a Blue Snowball ICE if you use a desktop (it comes with a stand), or a Snowflake if you use a laptop (it can attach to the monitor like a webcam). Those have really good sound quality for cheaper than a lot of the headsets in this thread.
EDIT: The Blue Tiki is also a good mic for laptops as it has really good noise cancelling. I've not actually used one myself, but they are apparently very good for voice recordings, Skype, etc.