I need a firewire to AES/EBU audio interface for the Macintosh that we use for video editing so I can plug it into our router and listen to the audio on our mastering speakers. Any suggestions? I only need two channels and don't want to spend a lot. We currently have a PreSonus and it keeps losing sync when we rendering Final Cut. When it loses sync we have to restart the Mac in order for the Presonus to recognize the firewire Any suggestions are most welcome.