If you're looking for a lower cost headset, I can recommend the SkyLite headsets offered for around £70, via E-bay by DavidJKnight of Shrewsbury.
I bought one of these headsets from ebay (about €50) admittedly from a different dealer, and got what I paid for. I found the sound quality to be terrible (like listening to something down a metal pipe), and my passenger reported that it was very hard to hear what I was saying. I used it for a few minutes to see what it was like, and have never used it again.
If you intend to fly for a long time (not just get a PPL and give up) then I would suggest getting the absolutely best headset that you can afford. If you're not sure how long you will be flying, or think you will be able to afford a better one in a years time, then don't bother buying one yet.
dp