On board television
Ok I have been looking into the same thing but not a 12V system. I found two with the built in DVD Toshiba 23" 120V Flat screen $1595.00 Best Buy. They also had a 15" RCA built in DVD was 120V or 12V with an adaptor.The RCA was lo res and not HDTV pixel was about 786x456 compaired to the other models the picture quality was not very sharp with all the settings tweeked as much as I could get them it was fair and was $586.00. I would think hard about a 120V with an sein wave invertor to power it up if you want a great picture.