G.B.
I have a cheap one two that works good. I think I got it from Target for around $80. We have used it for a couple of years with no problems, though we only use it on long road trips, not around town.
I was recently reading reviews on them, because now that we have 2 kids, I wanted to get one with 2 screens that attached to the headrests, rather than resting on the console, like we normally do (it can slide all over the place in the car). I read that Disney makes a good one, with 2 screens and that fit snap togethere and can accomadate seperate headphones. It looked nice. I think it was between $100-200.