CPU Cooler - Not needed when not overclocking. The stock Intel cooler will be just fine.
MB - Look toward H97. H81 is OK at best. In order, look toward H97, B85, H87 and then H81.
MEM - Those modules are high latency being DDR3-1600 CL10. Look toward DDR3-1600 CL9 @ 1.5v.
GPU - The GTX 960 is barely capable of smooth game play at high resolutions (above 1080) so it will rarely take advantage of the 4GB when gaming at 1080 resolution. Look toward the 2GB version of the GTX 960, or step up to the GTX 970.
HD - The WD Blue sees less failures.
PSU - No. XFX, Seasonic, the EVGA G2 lineup, or filter through the Tier 1 or Tier 2 list. That Corsair CX model is a Tier 4 unit. www.tomshardware.com/forum/id-2547993/psu-tier-list.html
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor (£138.52 @ More Computers)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard (£68.36 @ Scan.co.uk)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory (£36.04 @ CCL Computers)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£39.98 @ Scan.co.uk)
Video Card: EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Video Card (£249.54 @ Aria PC)
Case: Thermaltake Versa H24 ATX Mid Tower Case (£26.57 @ CCL Computers)
Power Supply: XFX TS 550W 80+ Gold Certified ATX Power Supply (£37.99 @ Amazon UK)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£9.38 @ CCL Computers)
Keyboard: Cooler Master CM Storm Devastator Gaming Bundle Wired Gaming Keyboard w/Optical Mouse (£25.49 @ Scan.co.uk)
Speakers: Logitech Z323 30W 2.1ch Speakers (£19.99 @ Amazon UK)
Total: £651.86