You probably won't get much of a response to a serious question with a title like that - a lot of us skip over the chit chat if we just want to keep up with the mods and maintenance threads. But anyhow, since I'm here... 
IIRC there were one or two folks who installed tiny LCD's in the change pocket to the left of the steering wheel. They might be good as a novelty, or for a backup camera or something, but probably more trouble than they are worth.
I also think there was at least one VX with head rest mounted LCD's. It's a custom job, and it's not cheap. If there are prefab replacements out that for another vehicle that would fit the VX (or could be made to fit), that would probably be the easiest and cheapest way to go and as long as the match was pretty decent, it would be as good as any custom job or better. If the match from front to back isn't real good you could always replace the rears also (not with LCD's, but with something that matches well).
I had seriously considered installing some for my kids in the back seat, but decided against it because we have two cars, and the VW is the car we would take on longer trips. In our situation, it makes much more sense to spend $200-300 for a dual LCD solution with headrest mounting straps that can be moved between vehicles than to spend $1200-1500 on something that would be under utilized.
-KP
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