I got hold of a cheap LG headset but it was terrible, I guess you get what you pay for.
I returned it and got the Official PS3 one for $40, it was priced up wrong in my local FutureShop!!.
It is really well put together compared to others I have seen and has good sound quality to boot, I'm very happy with it.
Trash talkers are a real pain in the arse, but not as bad as nuke-boosters on MW2. Grrrrr