Well, probably what I already have, though more expanded.
A top-of-the-line gaming desktop
3 Apple Thunderbolt Display
1 27" Dell IPS (ATD doesn't take PC)
Retina MacBook Pro 15" (Maxed out)
MacBook Air 13" (Maxed out)
iPad 4 64GB + iPhone 5 64GB + Blackberry 10
Razer Mamba for the Desktop PC
2x Magic Mouse for each MacBooks (want gesture action too)
A set of 2.1 speakers for the gaming PC
Set of 2.0 Studio Monitor for the rMBP
Samsung 64" LED TV series 8
PS3 and Xbox 360 hooked up to the TV
Tannoy speakers hooked up to Sony Pre-amp and A/V
Good sound-proofing walls too.
And definitely a lot of air conditioning to keep the room cool enough to sit in...
This is just a 'dream' set, I by no mean have enough money to purchase all of these.