There are many Double Dins out there. Personally I like the Alpine ones. I have Alpine one my self.
Playing a DVD while driving is illegal, and you have to by pass the e-brake to use it.
If you get one that is satellite ready then you can use the satellite
Mine has a cable I can plug in my Ipod just like many others.
Go to
www.crutchfield.com do the live chat. They can point you into the direction you wanna go. Just tell them it is for a ford explorer. They wont sell you one if you tell them it is for a ford ranger. As it requires modification of the radio bezel to fit.