tv, because i used to have my ps3 down stairs on our 52 inch, but because my mum and dad always watch tv, they bought me a 40 inch in my room, samsung sweet as! perfect choice for me
i agree i would go with either the tv or the ps3 it would be completely pointless to get the x box. you could get a ps3 for lan parties if you and a friend really like to play split screen, because with 2 ps3s you could both be on 2 different tvs but play eachother and not screen peek. but i would recommend an hd tv so you can play your ps3 in high def.