USB, WIFI or Ethernet?

[Yippedidou]

Oh, I'm even more of an audiophile heretic in the headphone setup, Yippedidou. I'm relying on iMac/iTunes via AirPlay to Airport Express (gasp, yes, limited to 44/16, and yes Toslink output!), which then feeds my headphone rig. It works reliably, lets me use Apple Remote on iPad to control it, and sounds pretty good:

iMac/iTunes - AirPlay - Airport Express - generic Toslink cable - Genesis Digital Lens - Black Cat Veloce SPDIF cable - Red Wine Audio Audeze Edition - Audeze LCD-2.

Two magic words in your HP set up... Numero uno is the Genesis Digital Lens ( designed by Paul, zzzzze Paul of PSAudio ) and numero dos is Red Wine which I love to drink. I think that at some point, ITunes doesnt really matter when you have those two magic units. Great set up... Congrats!