Well, back to reality. I finally got to speak with a Crestron dealer about the system I had in mind and well, no way we're going to spend that kind of $$$.
So, we'll stick to individual home entertainment systems for each stateroom and a library of DVD's our guests can borrow whenever they like.
There are nice compact systems out there like Denon's S-301 that plays DVDs, CD's, will deliver great sound, even iPod connectivity and for a fraction of the price.
And for $ 65 we can buy a multi system, multi zone DVD player and hook it up in case our European guests bring their own DVD's. Approximate savings: $ 70 K :-).