Dual Headrest Dvd Player

Does anyone have a recommendation for a dual screen portable dvd player for the car?
I am especially interested in 1) sound quality 2) screen quality and 3) ease with which dvds can be changed/loaded while driving. This is for two kids in backseat so it would need a headrest harness.
There are lots of models out there, and usually very cheap.
Might I suggest getting a model that allows for input and output and not strictly for the Car. You’ll need a coupler but will be able to use these elsewhere and have the ability to have games systems or two different movies on them, but this will be a question as far as age ( since these will not have a headrest harness per say). You will need to look at good headphones or a RF modulator or mini cable or tape adapter (depending on the car).
If you gave just a little more detail i would feel better about a recommendation.
Lincoln Mercury Dual Headrest Dvd Player


