Need Feedback

i've decided to start a little project of my own. i'm going to make a custom gaming rig and i want you guys to help me with your technical masterminds
Chassi:


Intel Core i7 Quad 920 - CPU

Gainward GTX275 896MB GS - graphics

Kingston DDR3 2GB 1333Mhz x2 - RAM

Western Digital Caviar Green 1TB SATA2 - harddrive

ASUS P6T - mothercard

Auzentech X-Raider 7.1 - sound card

Axpertec 630W Ver 2.20 SLI Ready PSU - power supply

What do you think??

U can add a little bit more Ram. And u need Windows 7 Ultimate 64 Bit (64 Bit is important!)

change gfx card...

take the hd4890 from saphire -> much cheaper and more power

and dont take this i7 shit from intel lol...

take the AMD Phenom II X4 965 3.40GHz AM3 6MB 125W BLACK EDITION BOX...

then you have to change your mainboard of course

I was planning for Windows 7 cos vista is crap. and isn't 4GB RAM good enough?
--
Sapphire HD4890 1GB
GPU: ATi Radeon HD4890
Minnesstorlek: 1GB
RAM: GDDR5 @ 256-bit
Gränssnitt: PCI Express 2.0 x16
- CrossFireX
- DVI, DisplayPort & HDMI

But isn't HD5870 better?
-
Edit:
i found that CPU but reveiws says it's sounds a lot. so should i just buy any ordinary CPU-fan?
also, what motherbroad shall i use?
ASUS M4A785TD-V EVO???
But can i fit a 3rd RAM in there?
-
Liquid Cooling system?
-
Edit:
OMG i did some pricetagging and you guys made me lower the costs by 4K
13.593 or something to 8.840

ofc is 5870 better put it costs much more

twice the price both support DirectX11 so what?
But now i'm focusing my attention to the "mainbroad"

hd 4890 doenst support dx11 only 10 and 10.1

NZXT Hush Black -Chassi- 890:-

AMD Phenom II X4 965 Black Edition -CPU- 1.795:-

Sapphire HD4890 1GB -GPU- 1.790:-

Corsair Dominator DDR3 1600MHz 4GB CL8 -RAM- 1.479:-

Western Digital Caviar Green 1TB SATA2 -HardDrive- 749:-

Gigabyte GA-790XTA-UD4 -Mainbroad- 1.249:-

Axpertec 630W Ver 2.20 SLI Ready PSU -Power Supply- 599:-

9141:- / 893 Euros

why the heck you buy a soundcard...

you have an onboard card on your mainboard and this is good enough...supports 7.1^^

then it's around 8600

But, do i have to buy the operating system? Win7 or do that include in the motherbroad?
"Compatible with Window 7 to deliver the best operation experience" this means i have to buy it, right?
-
Edit:
Microsoft Windows 7 Ultimate EN -OS- 1.995:-

yes you have to buy it extra

Watch out for 64 Bit Version, cause 32 Bit doesnt support more 2 or 3 GB Ram. 4 GB is good But 6 or 8 are better
And wich idiot buys Vista. Vista i biggest shit that i have ever seen.

Win 7 Home premium = 32-bit
Win 7 Ultimate = 64-bit
also more ram is better and the motherbroad have 4 RAM slots witch i'll fill with 2 2GB RAMs and gives me 4GB RAM witch is good enough.
-
Also a good POV about home made computer is that you can always buy new things to it to make it better, if you buy pre-made you have to re-place the whole computer since computer manufactoring companies don't help you repair it if it's been customized.