last check before ordering

I made a few adjustments to your build:
http://uk.pcpartpicker.com/p/zLWYRB
I switched out the power supply, the Seasonic model I selected has an excellent reputation
I also switched out your memory, picking a kit with 4 matched moduals will give you more stability because kits that are sold together are given extra testing for compatibility. I also selected 1600mhz units for you as your CPU is only rated for 1600mhz RAM and your motherboard wont see anything higher then 1600 without overclocking.

I am assuming this build is for gaming? If you plan to overclock you will need a differnt CPU and motherboard.
 


a some kind of universal build. playing high end games and working with programs connected with creating music or something like that.

no there wont be any overclocking done. thanks for suggestion dhff i will switch the rams as you suggested
 


I know. but im not building this for myself, and the person its going to insisted on 32gb ^^ so I don't really care if he cannot take advice
 
As Tiny Voices Suggested, 32 gigs is proabably more then you will use if you dont have a specific need for it. If you go with 16GB then I suggest this kit:
http://uk.pcpartpicker.com/part/gskill-memory-f31600c7d16gtx
Its actually quite a bit faster then the other RAM kit I suggested.

@Tiny Voices: Yes Seasonic makes power supplies for XFX but the quality is not the same, The unit he listed is a notch below the Seasonic M12 II unit I suggested. Both are excellent units, dont get me wrong. but the Seasonic M12 II has a slightly better rating.
 
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-4790 3.6GHz Quad-Core Processor (£218.50 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£22.90 @ Ebuyer)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard (£40.01 @ Amazon UK)
Memory: Corsair Vengeance Pro 32GB (4 x 8GB) DDR3-1600 Memory (£236.78 @ Scan.co.uk)
Storage: Samsung 840 Series 250GB 2.5" Solid State Drive (£79.58 @ Overclockers.co.uk)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£49.98 @ Aria PC)
Video Card: MSI GeForce GTX 780 3GB TWIN FROZR Video Card (£359.94 @ Aria PC)
Case: NZXT Phantom 410 (White) ATX Mid Tower Case (£65.99 @ Novatech)
Power Supply: XFX XTR 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£84.78 @ Scan.co.uk)
Total: £1158.46
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-09-04 19:23 BST+0100