Why don't you build it yourself ? Its really not as hard as it seems.
Thats what you can get for 500 pounds.
PCPartPicker part list:
http://uk.pcpartpicker.com/p/rHQQwP
Price breakdown by merchant: http://uk.pcpartpicker.com/p/rHQQwP/by_merchant/
CPU: Intel Core i3-4150 3.5GHz Dual-Core Processor (£81.99 @ Ebuyer)
Motherboard: Gigabyte GA-B85M-D3H Micro ATX LGA1150 Motherboard (£54.82 @ Ebuyer)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory (£60.34 @ Ebuyer)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£37.50 @ Aria PC)
Video Card: Sapphire Radeon R9 270X 2GB Dual-X Video Card (£119.00 @ Amazon UK)
Case: Xigmatek Recon ATX Mid Tower Case (£28.51 @ Amazon UK)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply (£35.06 @ Amazon UK)
Optical Drive: Samsung SH-224DB/RSBS DVD/CD Writer (£12.76 @ CCL Computers)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£69.65 @ CCL Computers)
Total: £499.63
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-09-23 13:46 BST+0100
That's much better and as expensive.