I'm thinking of using a new iMac to play my music. I now have most of my CDs in Apple lossless. I was planning to take the iMac digital output (optical) and feed it straight to my Supernait, which has onboard DACs which I think would be better than the ones in the iMac. Any opinions on how that might work/sound. Also, does anyone have a view on the effect of doing it through an Airport (again using the digital to the Supernait)?