Seems decent enough, PSU brand not listed and no OS. Building one would save you some cash:
PCPartPicker part list:
http://uk.pcpartpicker.com/p/3Ohrt
Price breakdown by merchant: http://uk.pcpartpicker.com/p/3Ohrt/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/3Ohrt/benchmarks/
CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor (£136.79 @ Aria PC)
Motherboard: MSI B85-G41 PC Mate ATX LGA1150 Motherboard (£53.44 @ Amazon UK)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory (£56.78 @ Amazon UK)
Storage: Sandisk Ultra Plus 64GB 2.5" Solid State Disk (£40.11 @ Amazon UK)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£48.68 @ Aria PC)
Video Card: MSI GeForce GTX 760 2GB TWIN FROZR Video Card (£168.91 @ Scan.co.uk)
Case: BitFenix Comrade ATX Mid Tower Case (£28.04 @ Aria PC)
Power Supply: Zalman 550W 80+ Gold Certified Semi-Modular ATX Power Supply (£48.91 @ Amazon UK)
Optical Drive: Lite-On iHAS124-14 DVD/CD Writer (£11.48 @ Scan.co.uk)
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) (£59.00 @ Amazon UK)
Total: £652.14
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-21 17:30 BST+0100)
It is £10 more but includes an OS and is made from undoubtedly better quality parts