Help build a new pc 600 budget

[something_fishy]

I need help building finding good parts for my pc, if you guys could help me build a pc near 600 dollars that would be great.

I also found two pc's online but im not sure how good they are. Your thoughts?
http://www.amazon.com/CyberpowerPC-GUA250-FX-4100-Gaming-Desktop/dp/B005TJKGTM/ref=pd_cp_pc_0

the other pc:

http://www.amazon.com/CyberpowerPC-Xtreme-GXi250-NVIDIA-Geforce/dp/B0051UWEH6/ref=pd_cp_pc_2

 

[bigcyco1]

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-2100 3.1GHz Dual-Core Processor ($89.99 @ Microcenter)
Motherboard: ASRock Z68 PRO3 GEN3 ATX LGA1155 Motherboard ($104.99 @ Newegg)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1333 Memory ($42.99 @ Newegg)
Hard Drive: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($74.99 @ Amazon)
Video Card: Asus Radeon HD 6850 1GB Video Card ($137.55 @ Newegg)
Case: Rosewill CHALLENGER ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: SeaSonic 520W ATX12V / EPS12V Power Supply ($69.64 @ Newegg)
Optical Drive: Sony AD-7280S-0B DVD/CD Writer ($17.99 @ Newegg)
Total: $588.13
(Prices include shipping and discounts when available.)
(Generated by PCPartPicker 2012-05-27 23:56 EDT-0400) My thoughts on the links you provided to those prebuilds they are not good