I was wandering how I could get the best sound out of a mac/itunes - thanks for your extremely helpful review!
How are you connecting the mac to the dac ? Also, is iTunes able to play all formats in that way (apart from apple drm tracks)? Have you ever tried to play video (podcast/movie/other) on iTunes - does the audio part still get transfered digitally to the dac or you have to use an analog straight to the preamp for that (for example you have to do that if you are using airport express).
Thanks again and happy listening!