Guys, I need to get a smallish screen that my son can take on holiday so he can use his 360. I have an 8" Nikkai TV that I bought in Comet. This has some type of 'AV in' socket that looks like a mini-jack socket. I don't know if I can use that. Otherwise I guess anything up to about 19" would do but I do need him to be able to use headphones. Any advice?