this is about as good as it gets for your budget..but it depends more on what the purpose of your build is and the rest of your specs..
PCPartPicker part list: http://pcpartpicker.com/uk/p/uRiI
Price breakdown by merchant: http://pcpartpicker.com/uk/p/uRiI/by_merchant/
CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor (£145.20 @ Aria PC)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard (£72.23 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£40.50 @ Amazon UK)
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-29 21:44 GMT+0000)