Help with budgeting on a new pc build

So i have been wanting to build a PC for some time now and i dident want to pick anything as i had no idea how much i had to spend on it and i just found out i have £1500 ($2496) and i was wondering what parts to spend what on. for exsample how much to spend on graphics card how much for mother board how much for the case and how much for the cpu and so on if any one has some ideas that would be great 

oh and i will mostly be using the pc for gameing

-Alex (っ◕‿◕)っ ♥

THANKS IN ADVANCE

http://uk.pcpartpicker.com/p/3jclw

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (£161.99 @ Aria PC) 

CPU Cooler: Be Quiet Dark Rock 2 57.9 CFM Fluid Dynamic Bearing CPU Cooler (£47.70 @ Aria PC)

Motherboard: Gigabyte G1.Sniper M5 Micro ATX LGA1150 Motherboard (£128.69 @ Overclockers.co.uk)

Memory: Corsair Vengeance LP 8GB (2 x 4GB) DDR3-1866 Memory (£70.56 @ Scan.co.uk)

Storage: Kingston HyperX 3K 240GB 2.5" Solid State Disk (£112.99 @ Amazon UK)

Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.24 @ Amazon UK)

Video Card: MSI GeForce GTX 780 3GB Video Card (£370.01 @ Ebuyer)

Case: Corsair 350D Window MicroATX Mid Tower Case (£84.96 @ Amazon UK)

Power Supply: Corsair RM 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£79.80 @ Scan.co.uk)

Operating System: Microsoft Windows 8 (OEM) (64-bit) (£71.93 @ Ebuyer)

Total: £1170.87