I'm not Dsnuts, but since I own the s500 and the mdr-zx701 (same as 700 but with mic/iphone controls) I'll chime in briefly. In short, the Sony is MUCH more comfortable and sounds very good, but the S500 sound quality is better. More definition, more bass punch. The Sony sounds more recessed to me. But if I need to listen for a long time, the Sony's win out, especially with the 8400 pads I put on them.