Whether you use iTunes, Spotify, Rdio, Pandora, or plain ol' Winamp to play music on your computer, you can get more out of it with the Meridian Explorer USB DAC ($300). Hand assembled in the UK, this high-resolution DAC connects to your PC via USB, offering 24bit/192kHz native conversion capability, asynchronous data transfer, a built-in headphone amp, 3.5mm and optical audio outputs, and Meridian's resolution enhancement technology to ensure that your music sounds its best — no matter what the source.