New Build - Mid-Range Gaming Setup

[Rebslack]

Looking at building a new system for my younger brother for Christmas.

He plays things along the lines of WoW, SC2, Battlefield 4, and Call of Duty. I'd like to be able to put something together that's going to be able to handle this on fairly decent settings with good FPS.

My budget is preferably £550, but could go over slightly if the benefit is there.

This is what I have so far:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-8320 3.5GHz 8-Core Processor (£115.56 @ Amazon UK)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£23.99 @ Amazon UK)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard (£59.00 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£62.00 @ Amazon UK)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive (£61.20 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 660 2GB Video Card (£138.84 @ Amazon UK)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case (£42.79 @ Amazon UK)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply (£48.02 @ Amazon UK)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£13.15 @ Amazon UK)
Total: £564.55
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-18 12:05 GMT+0000)

I've switched everything to Amazon, as it was where most of the parts were from already, to save on shipping and messing around etc.

Feedback and changes would be greatly appreciated.

Cheers,
Rebs

[Deleted]

Everything but the GPU is from Amazon:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6350 3.9GHz 6-Core Processor (£100.99 @ Amazon UK)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£23.99 @ Amazon UK)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard (£59.00 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£59.99 @ Amazon UK)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive (£61.20 @ Amazon UK)
Video Card: XFX Radeon HD 7870 XT 2GB Video Card (£133.99 @ Aria PC)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case (£42.79 @ Amazon UK)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply (£48.02 @ Amazon UK)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£13.15 @ Amazon UK)
Total: £543.12
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-18 14:20 GMT+0000)

I've gone for the 7870XT from Aria as it's an insane card for the sub-£150 market (EDIT: and changed to the 6-core CPU with the latest core architecture), so that it would fit under your budget.