I think you should have a plug-in for via epia m10k board users (or any board that supports 6 channel sound) that allows the mp3, video, dvd, nav... anything except fm, play through the 6 channel output on the board. then when you select the fm, it can use one of the 3.5mm jacks as a line-in so you can have fm too. I'm not sure if this is possible or not but it would be really benificail for people who love 5.1 dvds (as an example) but who still want fm radio.
I don't know if it is possible or not becuase of possible feed back from the line-in jack into the fm unit? Just a thought.