As a previous owner of MDR-1000x, I was in love with Sony's 1000 series, but I gave those to my girlfriend, and I had two pairs of ATH M50x, and while I love those headphones to death, I cannot carry them around everywhere. So, I decided to get myself these babies from Sony Wonderland, Dolmen Mall (Karachi), Karachi. I have already used the MDR 1000x, and the sound quality is same, and although it is not as good as the M50x, for something as mobile as this, I don't think I could have found anything better.