Sony's flagship Walkman, the NW-WM1Z, features many of the best technologies Sony has developed in all of their years developing mobile media players. Every part of this player is optimized, from the individual electronic components, the kimber kable made wiring, the incredible DACs built in; all adding up to fantastic sound quality in a mobile form factor. All of this tech is housed in a machined copper housing, which is then gold plated, giving the unit a substantial feel with amazing fit and finish. In our testing we have found this unit capable of powering even hard to drive headphones with great results. At $3199, the NW-WM1Z comes in at the top of Sony's mobile players, a premium price that is echoed in its construction and sound quality.