Double or Single Din? Opinions please.

[VishalStar]

Everyone,
 
I have an empty space staring back at me right now where the stereo used to be (no cage, nothing, just wires) and as much as i love the sound of my own voice, i would like some music when im driving.
 
Ive always wanted an in-dash touch screen dvd player, like the alpine or pioneer but recently i got thinking about the practical side of things:
 
Will i really watch dvds in my RX7? Most of the time im driving too fast to have time and i dont really want to sit around watching films in the car. its for driving!
 
What does everyone think? Im beginning to look at getting a really good single din unit and upgrading the rear speakers. Got some adzest? ones in the front.
 
Any ideas are helpful