I was looking for an easy way to add network capabilities to my HiFi amplifier. There are numerous options in different shapes and price ranges. The one product that stands out as probably the most compact and affordable of them all in Google Chromecast Audio. It fits in the palm of your hand and costs less than 40€!
The Marantz Melody Stream is a network audio receiver packed with features: WiFi, Internet radio, DLNA Audio-Streaming, lossless and gapless playback, Airplay, Spotify, vTuner, USB, digital and analog inputs and outputs as well as a stereo amplifier (2x 60W) to connect a pair of passive speakers. All in a nice and small package: 29 x 8 x 30cm, 2.7kg