New gaming PC build - Advice/comments needed

Solution
Better parts for the price :)

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (£163.44 @ Ebuyer)
Motherboard: MSI Z87-G45 Gaming ATX LGA1150 Motherboard (£101.35 @ CCL Computers)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory (£58.72 @ Ebuyer)
Video Card: MSI GeForce GTX 770 2GB TWIN FROZR Video Card (£239.72 @ Scan.co.uk)
Case: NZXT Source 530 ATX Full Tower Case (£66.00 @ CCL Computers)
Power Supply: XFX 650W 80+ Bronze Certified Semi-Modular ATX Power Supply (£62.69 @ CCL Computers)
Monitor: Asus VG23AH 23.0" Monitor (£179.32 @ Amazon UK)
Total: £871.24
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-17 20:38 BST+0100)

Don't know why PCPartPicker shows higher price but 4670k and Z87 motherboard are better for the money also don't get that 16GB RAM it's totally not worth the money unless you run some RAM intensive programs :)
 
Solution
Seems a bit too expensive to me for what you got. I would personally look at something like this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4440 3.1GHz Quad-Core Processor (£125.99 @ Aria PC)
Motherboard: ASRock Z87 Pro3 ATX LGA1150 Motherboard (£68.90 @ Amazon UK)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory (£65.93 @ Amazon UK)
Storage: Crucial M500 240GB 2.5" Solid State Disk (£82.99 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£39.50 @ Amazon UK)
Video Card: MSI GeForce GTX 780 3GB TWIN FROZR Video Card (£359.98 @ Scan.co.uk)
Case: Corsair 200R ATX Mid Tower Case (£39.95 @ Amazon UK)
Power Supply: Corsair Builder 750W 80+ Bronze Certified ATX Power Supply (£63.98 @ Dabs)
Monitor: BenQ GL2450HM 60Hz 24.0" Monitor (£119.99 @ Aria PC)
Total: £967.21
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-17 20:41 BST+0100)