Gaming computer

Hello.My name is Tanel from Estonia
I am gona buy soon new computer.
Well i select parts and then i make an order from local IT shop here.
I did want to go with:

Asus Socket 1366 RAMPAGE III EXTREME

Intel Core i7 980X Extreme Edition 3.33 GHz 12MB Socket LGA1366

Corsair DDR3 PC-15000 1866MHz 6GB CL9 (9-9-9-24)(KIT OF 3 - 2GB)

SSD hard drive ( dont know yet wich one)

Graphics card: 1xSapphire RADEON HD 5970 4GB ord 2x cheaper 2GB HD5970 cards via crossfire (tho i dont know what to chose)

And as i play and wach movies and listen all kind of music using computer i dont know what sound card to chose.
reative SB X-Fi Titanium - Fatal1ty Professional Series or Asus Xonar Essence STX or Creative SB X-Fi Titanium OEM

Case for mentioned computerwill be
a.) Cooler Master HAF X RC-942-KKN1 Big-Tower
in this case i wold also fill optional fans
1x 200 mm (lid optional)
1x 120 mm (VGA fan tunnel, optional)
1x 80 x 15 mm (VGA-holder, optional)
Tho i dont know for performance and quietnes what should i get

b.) Coolermaster Cosmos S RC-1100-KKN1-GP
in this case i wold fill also optional fans
2x 120 mm

And i dont know what powersuply to get.
Also CPU cooler (i preffer if it is not watercooling)

Please can you help me to deside.
(PS!Sry i know my english is not perfect)

Wow, you sure you want to dish out that much money on this? You could save hundreds of dollars (well don't know what pricing is there) ditching the 980X and opting for a 930 instead. In terms of gaming performance, if you overclock, then the performance will be very small.

Waste of money.