Im in the process of purchasing an Arcam A19 amp and Kef LS50 speakers The source to run this will be my ipad/iphone using spotify premium mainly. Im looking at the best way to to get the music to the amp and out of the speakers and am leaning towards a DAC either the Arcam AirDAC or irDAC Question is, what will off the best sound, will the airplay option be as good qulaity as a wired connection to the irDAC ? also does anyone have any other suggestions? this is a second room system in my dining room and as such I wont need to connect other sources but I do like the idea of wireless streaming thanks