I've never heard of valor.
I just sold an Alpine screen for much cheaper than that with a PS2. Search for CVA-1004. They need an external dvd drive, but you can get a PS2 for about the price of a mobile DVD player and then also be able to play video games. It's easy to set up. You just hard-wire a power inverter to the cigarette lighter for the PS2(just remember to turn off the inverter when done...it's annoying to find a discharged battery). Mount the PS2 on the transmission well with velcro and it'll be within reach. All that is still cheaper than that system. You can also buy a 50 dollar module to hoook up a CD-changer, the PS2, and other screens.