I am running win7 with onboard sound into a Luxman R-117 outgoing to a pair of Paradigm monitor 11 towers. I love the sound of the luxman and the paradigms but I am looking to see if I can get any better sound from pc to the luxman. I have read where some say that the luxman will do all the digital to analog conversion and some say that an external dac would help between the pc and luxman, well, I am new to this environment so I am looking for thoughts and inspriation.