So my friend asked me to build a computer for him. I'm not the best when it comes to this, but here's what I came up with. I told him I'm gonna make a post here to see what you guys think. He needs a monitor as well, so I included that in the build. He said he's fine with the cheapest one on PCPartpicker.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 760K 3.8GHz Quad-Core Processor ($73.88 @ OutletPC)
Motherboard: MSI A78M-E35 Micro ATX FM2+ Motherboard ($56.99 @ SuperBiiz)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($59.99 @ Newegg)
Storage: Western Digital RE3 1TB 3.5" 7200RPM Internal Hard Drive ($49.49 @ Amazon)
Video Card: Sapphire Radeon R9 270 2GB Dual-X Video Card ($144.99 @ Newegg)
Case: NZXT Source 210 (White) ATX Mid Tower Case ($33.99 @ SuperBiiz)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($25.99 @ Newegg)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($13.98 @ OutletPC)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($88.98 @ OutletPC)
Monitor: Hannspree HL161ABB 15.6" Monitor ($65.99 @ SuperBiiz)
Total: $614.27
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-22 00:23 EST-0500

What is this computer going to be used for?
- Gaming
- School work
What is your budget?
$600 (A little over is ok) American
Where do you live? If in the US, do you have a nearby Microcenter?
I live in the US no near computer stores
What is included in the budget?
Tower,Keyboard,OS,Monitor
Will you be overclocking?
No
Will you be reusing any parts?
Nope
What OS do you want?
Windows 7
Any specific case preferences?
Black or Blue is fine (No white)
Any other special features that you want in the build?
nope

So I'm just trying to get some feedback on the build I came up with above. Thanks for the help