I was longing for a headphone that I could but that I knew could blow any headphone away for about $100, I went on CNET and saw S4's on review, and I fell in love with them once i first used them. Now I want even more now that I've been turning into an audiophile, and I'm planning on doing a blind headphone test between beats and klipsch to post on youtube. I've been leaning towards the X10's at first cuz I heard they have great bass response, then back to the M40's since they have a cloth cord, active noise cancelation, and 2 separate drivers. But I really wanna know whats in both headphones so you guys can help me with the final verdict!