I'd like to comment on a few things. Most important thing first, your motherboard and CPU are not compatible. The motherboard uses an AM3+ socket and the CPU uses an FM1 socket. Second, don't use an APU with a discrete graphics card like mentioned above. Go with a Phenom or Athlon instead. Last thing, you might want to spend a bit less on the case and motherboard since you're on a budget. Maybe look at a 200R instead, get a ~50 dollar motherboard and bump that CPU up to an FX-4300 (which is an AM3+ socket type by the way, so pay attention to that while browsing motherboards. You don't want to order your parts and find your CPU wont even fit in your motherboard!)
Also, if you're buying today here's a great deal on an HD 7850, which is quite a bit better than the 7770 for less money.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150642
Edit:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Newegg)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($64.99 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($52.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: XFX Radeon HD 7850 1GB Video Card ($89.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($39.99 @ NCIX US)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($29.99 @ Newegg)
Total: $432.92
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-09 21:42 EST-0500)
Here's a part list that is $522 before mail in rebates. I wasn't sure if you needed it before mail in rebates or not, but if you are able to go to 520 after mail in rebates you can upgrade the PSU to that CX500 and possibly fit in a 7870. I think you'll be happy with this for $520.
Things I changed from your part list:
Corsair 200R: Simply the best budget case there is. Cheap, good airflow and cable management. In a budget build like this you want the most performance you can squeeze out of your parts. You can always upgrade case later.
CX430: One of the best budget PSU's. You WILL need to upgrade this in the future if you plan on upgrading your GPU.
FX-6300: Much better CPU, plus you get a free Far Cry 3 Blood dragon with it
Radeon HD 7850: Two tiers higher than the 7770, for 30 dollars less.
WD Caviar Blue 1TB: Same price as the 500gb one, double the capacity.
Ripjaws: For some reason on my newegg it was showing the ripjaws you picked as $80 dollars, but when I searched them on newegg myself they were $52 dollars, so I picked the $52 dollar one for you.
Facebook
Twitter
Instagram