HiFiBerry DAC for the Raspberry Pi

For a long time I've been looking for a way to play music from Spotify on my phone through my home stereo system without having to connect it to the amp directly. There are a couple of reasons for this with the main one being that the DAC (the thing that converts digital music to analogue so that it can be sent out via the headphone jack) in all mobile phones is very poor, not a complaint really as they're designed for headphones and to be small, not suitable for use with a nice amplifier at all.