I purchased a doube-din touch screen car stereo head unit that also has DVD video capabilities. My TV will be connected to the head unit. DVD's will played through the head unit and will transmit the video to the TV and the sound will be broadcast through the speakers connected to the head unit (including sub woofer). The head unit is not surround sound...in fact I didn't know they made surround sound head units? The only problem with this set up is that car style head units use composite video rather than HDMI or the like HD.
ON another note I checked out your blog the other night...GREAT WORK. You are about 6-9 months ahead of me. Question for you, how did you cut the holes for your puck lights? I love the lights you bought but haven't been able to find them on eBay