One of the best if not THE best headphones in this price range.
Warning: They will show up any faults in your music setup and will make bad MP3`s sound worse,but if your setup and music collection is high quality you will benefit from from these.
I have had them for well over a year and they are the best I have owned including £200 Shure and AKG`s.
They are monitor style and therefore produce a natural sound not a processed unnatural sound.
A link to some reviews are here :http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16826159421