i want the best £375 gaming pc

This is a good gaming build. You could upgrade CPU later. But you should spend £25 more now for a FX-6300.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD Athlon II X4 640 3.0GHz Quad-Core Processor (£55.73 @ Maplin Electronics)
Motherboard: Gigabyte GA-970A-DS3P ATX AM3+ Motherboard (£49.96 @ Amazon UK)
Memory: G.Skill Ripjaws X Series 4GB (2 x 2GB) DDR3-1600 Memory (£36.83 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.99 @ Amazon UK)
Video Card: MSI Radeon R7 260X 2GB Video Card (£101.52 @ Scan.co.uk)
Case: Cooler Master K280 ATX Mid Tower Case (£29.99 @ Aria PC)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply (£44.98 @ Amazon UK)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£11.78 @ CCL Computers)
Total: £373.78
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-07 15:49 GMT+0000)
 


Agreed, try to spend some more for the CPU. This is a great deal.
 


True; the CPU may bottleneck the card a bit but very little.
 
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD Athlon X4 750K 3.4GHz Quad-Core Processor (£54.90 @ CCL Computers)
CPU Cooler: Cooler Master Hyper TX3 Evo 43.1 CFM CPU Cooler (£15.94 @ Ebuyer)
Motherboard: Gigabyte GA-F2A55M-DS2 Micro ATX FM2 Motherboard (£33.94 @ CCL Computers)
Memory: Crucial 8GB (1 x 8GB) DDR3-1333 Memory (£55.17 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£35.99 @ Aria PC)
Video Card: EVGA GeForce GTX 750 Ti 2GB Video Card (£110.82 @ Ebuyer)
Case: Fractal Design Core 1000 MicroATX Mini Tower Case (£29.97 @ Ebuyer)
Power Supply: XFX 450W 80+ Bronze Certified ATX Power Supply (£20.00 @ Maplin Electronics)
Optical Drive: Lite-On iHDS118-04 DVD/CD Drive (£10.78 @ Scan.co.uk)
Total: £367.51
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-17 20:02 GMT+0000)