I had a Turtle Beach headset and the sound was Ok, even the Mic was OK and I only got them because I had Argos Vouchers. They did the jobt weren't particularly great at any one thing. Like all my headsets they broke after about 13-15 months in the same place as always, just above the earcup. I think I have a massive head or something.
I have a set of Roccat Kave 5.1 Analogs now and they seem OK. Sound is good, even the 5.1 works to a degree and they show no signs of stress so far. When it comes to headsets by cheap, buy 3 or 4 times I've found. The Roccat's were £50 which is the most I've ever spent.