Here's a recommendation:
Processor: 3.5 GHz POWER7 eight core processor
You'll need just 360 of them.
Just 16 TerraBytes of RAM
You won't need to worry about HardDrives, everything is stored in RAM.
It's in the affordable price range of $3 million dollars
You might have some lag with max shaders if you're simulating the universe at 1000x speed in the background
(I'm suggesting you buy IBM's Watson. I'm also joking)