Pft, I've never heard a Runco projector that sounded remotely decent at all. 
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Pft, I've never heard a Runco projector that sounded remotely decent at all. 
Reading is a life skill:
Totally is! 
Lets not start taking this thread seriously shall we. 
yep :)
Eee Pee:
That's crazy.
Has anyone ever heard one of the giant horn set-ups? I"m curious.
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I always imagined I would do something like the system mochimon mentioned:
I bet they can keep their room ice cold with that circle of amps so close.
I find surprising that nobody has mentioned the enigma system.
Could you please let me know where you got that picture with the circle of amp? INCREDIBLE!
Let's rephrase the question for those unwilling to play along.
If you had the opportunity to demo any home theater setup in the world, cost-no-object, and you would continue to happily own all the equipment you currently do, what would you be most curious to try?

You see that wasn't my question.... :P My question was, if a billionaire had billions of dollars to spend and he wanted THE BEST of the BEST. for his home cinema... What would he buy? Certainly if you have 50 billion USD in your bank and loved hi-fi equipment you'd spend more than a few thousand -__-
If I were that billionaire, then I'd pay Katy Perry whatever amount she wanted to come to my castle, sit on my lap and sing into my ear. Actually, strike that. I'd rather she not sing. She can just come...um...sit on my lap. Money well spent.
In all seriousness, however, I really like the idea about a private amphitheatre in your mansion that you'd hire an orchestra to come perform in.

you guys are freakin idiots.
$6 million home theatre: http://freshome.com/2008/02/07/jeremy-kipnis%E2%80%99-6000000-home-theater/
this entire building was redone for this 2 channel listening room. its on its own power line, and has been changing a LOT over time: http://forums.audiogon.com/cgi-bin/fr.pl?vaslt&1036349020
according to some quick googling, an entry-level imax theatre costs a little over $3 million to build - not bad at all. of course this is just construction costs, and doesn't look at the cost of upkeep and staffing of the theatre - not to mention the hefty liscencing of commercial high-res films (if u have a screen like that, blu-ray would simply not cut it)
personally, i know i could top these budgets, but most of that money would be spent towards outrageous architecture, staffing, and rediculous amenities. If you really wanted to make it special you would need to put some thought into it - like you would need to buy and display major objects of movie history: scripts, original prints, set pieces and props, costumes, etc.. hell, if i were doing it, i would straight up finance and produce my own damn films - so i could really watch what *I* want to watch.
Finally a serious answer :)
Though I've seen that home cinema many times before... Is it the best of the best though?
I also have a hard time believing it costs 6 million dollars... Anyone know the prices of individual items?
I think you can get the sub woofers for $2500 each (X16) and the McinTosh's are $2000 or so... times 30. I do believe the Sony SRX-S110 4096x2160p projector is $200,000+
But where on earth is the 6 million figure from?
A significant portion would be building the right room, or space, to house the system.
Personally, I think that to build a a proper fantasy sound system you need to start with a solid foundation, as in a nice bassement:
http://gizmodo.com/#!5025867/worlds-largest-horn-subwoofer-takes-up-crazy-mans-entire-basement