I know this gets good reviews. I am thinking of getting this to replace using my airport express and old iphone 3gs for spotify. I will also use it to stream music from my iMac to my hifi. How good is the integration with an iMac (running Lion). How easy is the setup? Does it need some extra software to run spotify? It would be running into a Rega DAC, Arcam amp and Mission loudspeakers