Both of these builds are good, enough RAM, powerful GPU and CPU, liquid cooler gives better temps and enables overclocking, with the unlocked processor. Both great looking with a small ITX build and a slightly bigger mATX build, but with capability for ATX. Personally I would buy a window-less case and mod a window onto it, as I find that easier and it's always cheaper.
If you want a design for a full ATX build then I can do that!
Hope you like it
mITX
PCPartPicker part list:
http://uk.pcpartpicker.com/p/h2Cggs
Price breakdown by merchant: http://uk.pcpartpicker.com/p/h2Cggs/by_merchant/
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor (£178.00 @ Amazon UK)
CPU Cooler: Thermaltake Water 3.0 Performer C + LNC 81.3 CFM Liquid CPU Cooler (£41.99 @ Aria PC)
Motherboard: MSI H97I AC Mini ITX LGA1150 Motherboard (£79.39 @ CCL Computers)
Memory: Kingston HyperX Fury White 8GB (1 x 8GB) DDR3-1866 Memory (£33.08 @ Ebuyer)
Storage: OCZ Trion 100 240GB 2.5" Solid State Drive (£62.85 @ Amazon UK)
Storage: Toshiba 1TB 3.5" 7200RPM Internal Hard Drive (£29.99 @ Aria PC)
Video Card: EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Video Card (£251.94 @ Aria PC)
Case: Thermaltake Core V1 Mini ITX Tower Case (£32.42 @ CCL Computers)
Power Supply: Fractal Design Integra M 550W 80+ Bronze Certified Semi-Modular ATX Power Supply (£46.98 @ Novatech)
Total: £756.64
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-10 20:15 BST+0100
mATX
PCPartPicker part list:
http://uk.pcpartpicker.com/p/QXQhHx
Price breakdown by merchant: http://uk.pcpartpicker.com/p/QXQhHx/by_merchant/
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor (£178.00 @ Amazon UK)
CPU Cooler: Thermaltake Water 3.0 Performer C + LNC 81.3 CFM Liquid CPU Cooler (£41.99 @ Aria PC)
Motherboard: MSI H81M-E33 Micro ATX LGA1150 Motherboard (£33.29 @ Amazon UK)
Memory: Kingston HyperX Fury Blue 8GB (2 x 4GB) DDR3-1866 Memory (£32.99 @ Aria PC)
Storage: OCZ Trion 100 240GB 2.5" Solid State Drive (£62.85 @ Amazon UK)
Storage: Toshiba 1TB 3.5" 7200RPM Internal Hard Drive (£29.99 @ Aria PC)
Video Card: EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Video Card (£251.94 @ Aria PC)
Case: Fractal Design Define S w/Window ATX Mid Tower Case (£68.98 @ CCL Computers)
Power Supply: Fractal Design Integra M 550W 80+ Bronze Certified Semi-Modular ATX Power Supply (£46.98 @ Novatech)
Total: £747.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-10 20:22 BST+0100