This for your van computer? I've been lookin into this for a while but I dont think theres much point unless you pick up a monitor that isnt effected by the sun (which has a technical name I've foroggten) but they lots of money, like 200 quid. Imainge the frustration of not being able to see the screen as you want to change the tune your listening, or using it for you satnav, almost makes it worthless. I also think theres no use getting a USB screen as apparently they dont handle graphics too well so you might aswell just wire in the extra wires from a more hardcore one.
Apparently Lilliput are good T: