Need opinions about new pc-gaming rig!

[cyber_marco]

Hello everyone. I'm new in building pc-rigs and i would like to hear your opinion about my hardware selection (if you don't mind )
I want to build my pc with these parts:
-AeroCool Vx-E Pro € 58,81(Review of AeroCool Vx-E Pro desktop case | Testseek Labs)
-Corsair TX850W € 99,94(Welcome to Corsair :: TX Power Supply Product Information)
-Asus P6X58D-E € 177,70(ASUSTeK Computer Inc.)
-Intel i7 930 € 208,92(Intel® Core)
-Corsair Dominator DDR3 6Gb/1600Mhz € 117,89(Welcome to Corsair :: Corsair DDR3 Memory for Intel® Core™ i7)
-Western Digital Caviar Black 500Gb € 46,21(WD Caviar Black 500 GB SATA Hard Drives ( WD5001AALS ))
-Samsung Blu-Ray Combo Sata € 57,06(Samsung SH-B083L 8x BD Combo Drive. - SH-B083L - Optical Disk Drives - Optical Disk Drives | SAMSUNG)
For the graphics card i want a GeForce GTX 470 but i can't decide wich one of these:
-MSI N470GTX-M2D12 € 215,34(MSI Global ? Computer, Laptop, Notebook, Desktop, Mainboard, Graphics and more)
-Gigabyte GV-N470SO-13I € 232,06(GV-N470SO-13I - GIGABYTE)
-Asus ENGTX470 € 237,95(ASUSTeK Computer Inc.)
Could you tell me which one is the best.
I would like to Overclock in the near future the CPU, which one is better, the corsair h70 € 82,00(Welcome to Corsair :: Corsair Hydro Series H70 CPU Cooler Product Information) or the Noctua NH-D14 € 67,00(Noctua.at - sound-optimised premium components "Designed in Austria"!), which one is better?
I'm interested in installing a second GPU in SLI mode in the future(that's why I chose an 850W PSU). Are the 3 stock fans enough for the case cooling or do I have to install 2 more on the top and 1 at the bottom? The budget is about 1000€ (prized in Italy, not including the CPU cooler for now)
If you have other combination, or know any European site that ships in Italy, I don't mind hearing them!
Thanks in advance

[glc]

Asus is the preferred video card manufacturer.

I'd look at one of the Asus P7P55 series boards and an i7-8xx CPU. This will use dual channel memory instead of triple channel. The X58 chipset is quirky and not very stable.