I recently picked up a used HT-DDWG700 to replace my ancient logitech surround sound system. In stereo it's already a great upgrade. I'm currently using my onboard sound because my old Creative Audigy card doesn't have an optical output. I'd really like to get the surround sound working in games, but really have no idea about any of this dolby or dts stuff. From what I can tell this new system doesn't support Dolby Digital Live (I try to set it under playback devices > properties > advanced in win 7 and it says no tone is played). Gaming is my primary concern, music secondary. What sound card do I need to get this to work? I do need it to be a PCI-E as it's all that's available in my rig. Thanks for your help.