Can I use mini-displayport for video and HDMI for audio simultaneously? More specifically, I'd like to be able to stream Netflix and other sites, play DVD movies, hi-def DVD-audio, and local media files (via Plex, VLC, iTunes, etc) to a surround setup. Background: I have a 2010 Mac mini connected to a 47" 1080 HDTV using a mini-displayport -> VGA adapter (because it provides a noticeably better image than HDMI). So my HDMI port is free for audio. I do not have any HDMI speakers to try this with. I've just started shopping around for a 5.1 system.