Well if you're budget is 1Million you're going to have a tough time spending all of it. I might as well get you pointed in the right direction, here's an entire system:
CPU -
Intel Core i7-980X Extreme Edition Meh, I know it's not much but you can't find anything better on newegg. Dirt cheap, only 1K.
MOBO -
GIGABYTE GA-X58A-UD9 One of these should be sufficient enough for your system. Comes with pretty every thing you'll ever need. This should be $800 I recall
GPU -
Nvidia ZOTAC GTX 480 The heart of you're gaming system. You'll run these puppies in 4 way SLI. Price? Only a measly 2K.
MEMORY -
G.Skill Trident 2000MHz 24GB (6x4GB) Don't know how much multi-tasking you'll be doing but it should suffice for running the next OS 15 years from now, Windows 10 = $1500
HDD -
WD Velociraptor 600GB 10000RPM 32MB Cache SATA 6.0GB/s Buy 6 of these for 6k each. 1k for 100GB of storage is a great price to capacity ratio. 4.6TB should be enough for your professional porn "collection".
SSD -
OCZ Z-Drive R2 E88 OCZSSDPX-ZD2E88512G Oh hell, you might as well go with 2 of these for 1TB of SSD storage 20k isn't much after all.
PSU -
Silverstone 1500W With 7 12V rails at 25A each it competes with nuclear powerplants.
CASE -
ZALMAN EXTREME HYBRID LQ1000 This case will take a strike from a baseball bat. At only $700 it's a steal.
COOLING - Please look into this website for some information
Cooling Nuclear Power Plants This will provide you the information you need to keep your PC from
imploding.
SOUND CARD -
HT|Omega Claro Halo XT Onboard sound cards wont do your speakers justice. $250 is money well spent on a sound card.
AUDIO -
Wilson Audio MAXX Series 3 This are HI END speakers in great condition, 40K a pop.
Display -
Sharp 108 INCH 1080p Display You'll buy 3 of these for an eyeinfinity setup. At 150k a piece it should cost around 450K in all.
So that's pretty much it. I hope this will let you look in the right direction even though I didn't hit the 1Million price point. Have fun wasting your money and risking another chernobyl alike explosion.