I just bought a pair of these few days ago. I taught i was looking for bass heavey headphones. When i tried the ATH-M50's they sounded lifeless in the low end. I just didn't like them. In the store i tried out the JBL synchros s700's, witch had damn powerfull bass but muddy mids and higs. When i put these on my head the first time... DAMN. Such clarity, such bass extension, such instrument separation. I was blown away. I bought them right away. There is however one thing that hit my eye badly. These are produced in China, not Austria. Now, looking at the build quallity i wouldn't give them 10/10, i would give them 11/10. Metal all around, nice and sturdy, comfy, amazing. But i read that some have quallity control problems... i don't know why is that but i really didn't like the fact they are not being produced in Austria. Other then that, this is the best pair of headphones i have ever heard in my life. I haven't had so much experience with very high end audio equipment but still... i wanted to share my experience. To me these are an audio discovery. I now have to get a decent DAC. They work well with an integrated soundcard but i heard de difference right away when my friend gave me an audioquest dragonfly.