Here you go.
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | AMD Athlon X4 860K 3.7GHz Quad-Core Processor | £55.94 @ Aria PC |
| Motherboard | Gigabyte GA-F2A78M-HD2 Micro ATX FM2+ Motherboard | £33.48 @ Ebuyer |
| Memory | G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory | £34.49 @ Aria PC |
| Storage | Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive | £29.99 @ Aria PC |
| Video Card | XFX Radeon R7 370 2GB Double Dissipation Video Card | £109.55 @ Aria PC |
| Case | Fractal Design Core 2300 ATX Mid Tower Case | £37.32 @ CCL Computers |
| Power Supply | Enermax NAXN ADV. 550W 80+ Bronze Certified Semi-Modular ATX Power Supply | £54.36 @ Amazon UK |
| Monitor | Hannspree HE225DPB 21.5" Monitor | £77.27 @ More Computers |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | £432.40 | |
| Generated by PCPartPicker 2015-12-13 15:26 GMT+0000 |
The x4 860k is a great budget chip which combined with the r9 370 will give decent gaming performance and will do great for music production.
if you have any questions feel free to him me up.