Is this good.

byza

Honorable
For around that budget, the AMD APU's tend to be the best value
PCPartPicker part list / Price breakdown by merchant

CPU: AMD A8-6600K 3.9GHz Quad-Core Processor ($89.99 @ Amazon)
Motherboard: MSI A88X-G41 PC MATE ATX FM2+ Motherboard ($72.99 @ Newegg)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-1600 Memory ($44.99 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.91 @ OutletPC)
Case: Corsair 300R ATX Mid Tower Case ($49.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($29.99 @ NCIX US)
Monitor: Acer H226HQLbid 60Hz 21.5" Monitor ($119.99 @ Amazon)
Total: $460.85
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-23 01:45 EDT-0400
 

byza

Honorable
AMD including OS
PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($107.99 @ Amazon)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($74.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1866 Memory ($69.30 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.91 @ OutletPC)
Video Card: XFX Radeon R7 265 2GB Video Card ($125.98 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($49.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($29.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($13.99 @ Newegg)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Monitor: Acer S220HQLAbd 21.5" Monitor ($104.98 @ Newegg)
Total: $720.10
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-23 18:20 EDT-0400

Intel build including OS
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($69.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: MSI Z97 PC MATE ATX LGA1150 Motherboard ($89.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1866 Memory ($69.30 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.91 @ OutletPC)
Video Card: XFX Radeon R7 265 2GB Video Card ($125.98 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($49.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($29.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($13.99 @ Newegg)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Monitor: Acer S220HQLAbd 21.5" Monitor ($104.98 @ Newegg)
Total: $707.08
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-23 18:23 EDT-0400

The AMD build is generally a better build, but if you wanted to upgrade to an i5 later than the intel would be a better choice. The PSU isn't great for overclocking, but a better PSU costs more. You can choose your own KB and mouse that you like.