Interesting
My server at the moment is an Acer Easystore, which is an Atom based NAS running Windows Home server. Interesting this replaced the Acer Revo (single core version) which is now down stairs connected to my TV.
So Ideally I would like to run the server on the easystore. WHS is based on Windows Server 2003.
My other option is for a pair of A5’s like this
http://www.audioengine.org.uk/
With an Apple Airport and run Airfoil to get the audio from spotify.
This is a slightly more expensive route but probably better quality sound.
Would be interested in alternatives to the airport as well.
Bazzer