Yep the only dual screen setups are dealer installed - the pic you have is of the invision setup - I have it in mine (had the invision in headrest monitors from my last car, so just ordered the enclosures to mount on the new seats). I can't live with a single with 2 boys that never agree, but these are a bit intrusive the way they hang off the back of the seats, they get in the way a bit getting in and out of the car and with the front seats in their normal positions, you can't fold the second row as the monitors are in the way and you have to move the seats forward. If they where a few inches higher, they would be better.

For some reason Tischer shows dual screens that are different on their website, but may just be an incorrect picture - go to www.getbmwparts.com and go to X5 accessories and they show dual screens in a different enclosure and setup (sorry, can't post the link as their site is down right now).

Rob