For those with lots of music on their computers and mobile devices, the Denon Ceol is an obvious choice of hi-fi system. That goes double for iOS users as it can be upgraded to use Apple AirPlay.  

Price: £499 | Denon

 The Ceol allows audio to be sent over Wi-Fi using DLNA or AirPlay, and directly from your iOS device or iTunes. Wi-Fi means it can also access internet radio and apps such as Last.fm and Napster. There's also an iPod dock and a CD player.

While many web-connected audio devices have been more about Wi-Fi than hi-fi, the Ceol offers superb sound quality, especially considering its very reasonable pricing.

One day, all hi-fi systems will work this way.