Sony would love if you bought its $3,700 Walkman for over-the-top audiophiles

Are you the sort of music listener who'll happily pay more for a set of earphones than you would on a nice computer? If so, Sony has the MP3 players for you. The company has released two ultra-high-end Walkman MP3 players aimed squarely at audiophiles. The headliner, the $3,700 NW-WM1ZM2 (pictured at left), mates an S-Master HX digital amp with "fine-tuned" capacitors, thick Kimber Kable (to link the amp to the headphone jack) and a 99.99 percent pure gold-plated, oxygen-free copper chassis -- a...