When we got our new van we opted to not get the ridiculously expensive entertainment package, but we promised the kids we'd get a DVD player put in (the drop down kind that is mounted on the ceiling). I want to do it soon, but have no idea where to go. Best Buy? Buy online - where? And then how would I have it installed? Any brands you recommend or not? I saw that you can buy online at Walmart and supposedly install yourself for $129... I'm definitely wary of that....We can probably spend up to $400. Help please!! TIA!