Xsports really has no idea, since Dual is an up an coming company and their products rival Pioneer and surpass Kenwood. He really needs to do his homework.
I found 2 at www.woofersetc.com that are good buys. Both are DVD/CD/MP3, both have A/V outputs for video screens in the rear of the vehicle, both are also flip out screens. Look on www.onlinecarstereo.com as well.