I'm on budget like 800 euros (1032 dollars).
I thought of this build:
Mobo: Asrock z77 extreme 4 - 121 eur
CPU: i5 3570k - 193 eur
GPU: Sapphire Radeon 7870 2gb GHZ edition - 200 euros
CPU cooler: CM 212 EVO RPK2 - 30 euros
HDD: WESTERN DIGITALCaviar Green 1TB 7k 64MB SATA300 WD10EARS - 69 euros
RAM: Kingston HyperX gray 1600 mhz 8gb (2x4) - 38 euros
PSU: SEASONIC SS-620GB 620W - 93 euros
Case: CM Elite 430 RC-430-KWN1 - 40 euros
Total: 784 euros.
So is this a good build, btw I have 19-inch monitor native resolution is 1440x900. So I wondered will I be able to play games like Skyrim, BF3, Risen 2 and the newer RPG/Shooters maxed? Also should I get a weaker GPU to buy i7 3770k? I would like to try video editing and I will probably use audio editing software too... But gaming is my priorty.
As far as your GPU and CPU situation. The 7870 is a great card, and I wouldn't downgrade. An ideal build has a GPU that costs twice as much as the CPU (or near that). The 3570k will do just fine with both gaming and video editing. The i7 is for people that edit for a living and use really big and expensive programs that are really resource heavy.
As far as FPS, you should be able to max out everything.
Thanks for fast reply, here the only Corsair ram available is 8gb vengeance although it isn't the blue one. Is it good enough? I think it is this one http://www.scan.co.uk/products/8gb-(2x4gb)-corsair-ddr3-vengeance-jet-black-pc3-12800-(1600)-non-ecc-cas-9-9-9-24-xmp-150v
That RAM will be okay, but make sure that when you put it in, put it as far way from your CPU cooler as possible. The high fins on the RAM could interfere with it.
As for the HDD, western digital is a great brand, i love them. Seagate is almost as good. However, you picked Western Digital's lowest end HDD. The Seagate is just as good, and a little better if anything, and its cheaper.