Time to Acsend Further - Thoughts on this build?

Just made two changes. Firstly, there's no reason on Earth to pay that much for thermal paste, and secondly the PSU. You'll be much better off with the higher quality Seasonic unit, especially given that it is fully modular, rather than semi.

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU Intel Core i5-4690K 3.5GHz Quad-Core Processor £174.90 @ Amazon UK
CPU Cooler Corsair H100i 77.0 CFM Liquid CPU Cooler £90.11 @ Aria PC
Thermal Compound Arctic Cooling MX4 4g Thermal Paste £3.99 @ Amazon UK
Motherboard Asus MAXIMUS VII RANGER ATX LGA1150 Motherboard £131.98 @ Dabs
Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory £53.56 @ Ebuyer
Storage Samsung 850 EVO-Series 120GB 2.5" Solid State Drive £53.99 @ Amazon UK
Storage Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive £38.34 @ Aria PC
Video Card MSI GeForce GTX 970 4GB Twin Frozr V Video Card £274.98 @ Amazon UK
Case NZXT H440 (Black/Red) ATX Mid Tower Case £87.54 @ Aria PC
Power Supply SeaSonic EVO Edition 620W 80+ Bronze Certified Fully-Modular ATX Power Supply £69.14 @ Scan.co.uk
Wireless Network Adapter TP-Link TL-WN881ND 802.11b/g/n PCI-Express x1 Wi-Fi Adapter £13.00 @ Amazon UK
Case Fan Corsair Air Series AF120 Quiet Edition (2-Pack) 39.9 CFM 120mm Fans £21.74 @ Scan.co.uk
Prices include shipping, taxes, rebates, and discounts
Total £1013.27
Generated by PCPartPicker 2015-04-20 10:20 BST+0100
/r/pcmasterrace Thread Link - uk.pcpartpicker.com