Recording would benefit greatly from upping the core count. With that in mind, I suggest opting for an AMD quad core. The build is still well within your budget, with a few a tweaks (cheaper RAM, HDD & GPU). Also added a budget cooler to allow for a decent overclock.
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | AMD Athlon X4 860K 3.7GHz Quad-Core Processor | $73.99 @ Directron |
| CPU Cooler | Zalman CNPS5X Performa CPU Cooler | $16.99 @ SuperBiiz |
| Motherboard | Gigabyte GA-F2A78M-D3H Micro ATX FM2+ Motherboard | $54.99 @ SuperBiiz |
| Memory | G.Skill Value 8GB (1 x 8GB) DDR3-1600 Memory | $43.99 @ Newegg |
| Storage | Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive | $46.89 @ OutletPC |
| Video Card | PowerColor Radeon R7 260X 2GB Video Card | $110.99 @ Newegg |
| Case | Xion XON-310_BK MicroATX Mid Tower Case | $24.99 @ Directron |
| Power Supply | Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply | $48.45 @ Directron |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $421.28 | |
| Generated by PCPartPicker 2015-07-06 12:01 EDT-0400 |