CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (£156.94 @ Amazon UK)
CPU Cooler: Corsair H60 74.4 CFM Liquid CPU Cooler (£59.50 @ Novatech)
Motherboard: ASRock Z87 Extreme3 ATX LGA1150 Motherboard (£84.99 @ Ebuyer)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£59.99 @ Scan.co.uk)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£41.40 @ Aria PC)
Video Card: Gigabyte Radeon R9 280X 3GB Video Card (£227.05 @ Dabs)
Case: Corsair 300R ATX Mid Tower Case (£58.98 @ CCL Computers)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply (£68.39 @ Amazon UK)
Kinda goes over the budget plus I had to take out the SSD..
Non K i5 = smaller price + no OC -> there's no point of spending money on water cooling.
K i5 = bigger price etc..