New Build $450-700 Fast PC

Approximate Purchase Date: The sooner the better
Budget Range: 450-700
System Usage from Most to Least Important:Browsing web, games, editing photos, editing videos, tons of multitasking.
Parts Not Required: keyboard, mouse, monitor, OS.
Preferred Website(s) for Parts: newegg.com
Country of Origin: USA
Parts Preferences: Whatever is the cheapest best quality.
Overclocking: NO
SLI or Crossfire: Maybe
Monitor Resolution: No idea
Additional Comments: Processor needs to be quad core with a decent video card, but nothing too expensive for the video card. Moderate game play but doesn't need to be able to run stuff on high settings, Medium is good. 4-6GM ram. 320-500 GB HD.