The i7 is a quadcore... I'm more impressed by the insane amount of graphics potential. Allow me to guess the price (in euro, I'll convert it then):

Intel i7 extreme - 850 €
Vista Ultimate 64 - 150 €

now we are at the 1000 € my new rig from last September costed me....
let's continue

2x300gb insane harddisks - 450 €
12 gb DDR3 RAM (2x6?) - 500 €
2x 4870x2 - 750 €

assuming equally potent stuff for framework:

case: 150 €
water cooling set: 250 €
insane psu (1 kw at least): 400 €

makes a total of... 3500 €
or A$ 8790
or C$ 7170
or US$ 5804
or GBP 4000

that's about one quarter of my annual income. Wow.