I would avoid pioneers if you are trying to play a dvd while driving or use it to feed other monitors in the car because of a toggle switch that you would have to install to get it to play...
I like to go with Kenwoods because all you have to do is ground the parking wire and it works...
as far as cheap electronics go I would most def stick to Dual and Lanzar they are some pretty good brands not thigh end stuff but they shouldn't break if cared for...