Need help with new rig

[patrick91]

Hi , this is my first post so sorry if i make any mistakes.

1. What will you be doing with this PC?
Mostly for gaming.

2. What's your budget? Are tax and shipping included in this budget? Is your budget flexible?
I have a budget of $1200, can be higher but lower is better.

3. Where do you live?
I live in Singapore but $1200 is about the same as S$1500,

4. What exact parts do you need for that budget?
CPU,RAM,Motherboard,GPU,HDD,Optical drive,Casing,PSU + the OS

5. If reusing any parts, what parts will you be reusing?
None,I'm assenbling a new system

6. What specific features do you need in a motherboard?
USB3,Sata3

7. What resolution output do you need?
1920x1080p, only a single monitor

8. Does this system need to fit into a particular space?
I have a small table and i want to put it beside my PS3

9. How comfortable are you with custom case design/modification and electrical wiring?
I dont want to mod the case

10. How important is the noise/silence of this sytem?
Doesn't matter

11. How mobile does this system need to be?
Doesn't matter

12. Do you already have a legit and reusable/transferable OS key/license?
I will be getting a windows 7 with this rig

13. When do you plan on building/buying the PC?
within the month, after i sort out the specs.

I will not be overclocking the CPU or GPU but i want it to fit in long Graphic cards, I.e. HD6970

 

[patrick91]

This is what i can make of

Silverstone TJ08E
Core I5-2500K (it's $10 difference with 2500 + might be overclocking in the future)
Gigabyte GA-Z68MA-D2H-B3
G.Skill RipJaw-X 1600 C9 (8GB=2x4GB)
WD HDD 1TB Black Sata 6Gbps
XFX 6950 2GB ( want to crossfire in the future)
Corsair HX 750W Modular

I want to ask if i crossfire 2 6950 cards, will there be enough space in this case?
+ How much heat will it build up there?
How much performance will i gain if i Crossfire 2 6950 vs a single 6970?