I love the sound of my imac rig and have sold off my cd players as a result.
imac (apple lossless)>usb wavelenght cosecant>eddie current HD2
this is the best set up I have heard and knocked a wadia 302 and exemplar 2900 out of the house. THe exemplar was on par with this set up but you can not beat the ease of use with itunes. PS I run the dvi out to the hdmi input on my 39" tv so now the imac is my dvd player and music server and I can surf the web off a 39" screen