I've just upgraded my 'home theater' (if a 42" tv counts as that) with a spanking new marantz amp. I have my dvd and cd player connected to it, and now I want to connect my htpc. The amp has HDMI input and the mobo has one too, so I'm using that to connect each other. My question is; is it worth upgrading (for sound quality) to a discreet sound card (like x-fi) since output by HDMI is digital already? I'm really confused with sound on a pc. Since HDMI sound output is digital, does it send the 0s & 1s on the dvd directly to the amp to be processed? And what about my lossless music?