yes..screens, 19's, 18's, 17's, body kits are for show..but that's the whole fun..do what you want.
I dont' knwo where you are getting this 1,000 for. Overall, it should cost you about $200 for screen, and $150 for the portable dvd player, the 7995 has an aux port, so you can hook up into there. You could also hook up a camera to rear and use the lcd to see when you back up. You can play video games if you hook a gaming system. If you go on long trips w/ ur girl or family or friends, they would enjoy watchin' a movie i'm sure.
Many of the things we do on our car, we do for ourself, if you want an lcd/dvd, then do it, who cares what other people think!
oh yea, I have a 7" LCD!! and I love iT!..I don't regret putting it in either!