[Solved] $500 gaming pc

Approximate Purchase Date: this week

Budget Range:$550 after rebate,shipping and GST(5%)(shipping and GST usually equal 50$)

System Usage from Most to Least Important: gaming, surfing the internet, school stuff

Parts Not Required: monitor,keyboard,mouse, CD drive, hard drive(I have a 500gb sata),
if also have a cicero ATX case but its over 5 years old and have no fans in it. so i expect that i would have to buy a new one but it would be great if i could and spend teh money on other parts of the pc.(i can post pictures if wanted...but its 5 years old)

Preferred Website(s) for Parts: WWW.newegg.ca (canada) .the Canadian version is usually more expensive but has same inventory as its american counterpart.

Country: Edmonton/Alberta/Canada

Parts Preferences: no preference

Overclocking: no..but it would be nice for down the road

SLI or Crossfire:no, but would be nice if it could

Monitor Resolution: 1440x900 and possibly a 42" 1080p plasma

Additional Comments: i would like to be able to hook it up to my 42" plasma and play some games(with reduced graphics of course)it has hdmi,vga and s-video outputs.
if I have bean unclear or forgot something just post it and deal with it ASP.

cpu-i3 2120(117$)/i5 2400 (if u want to overclock)
gpu-radeon hd 6850($150)
mother board-Gigabyte - H61M-DS/AS Rock America - H61M-S
psu-corsair cx 500(about70$)

It's a 2500k/z68 sli/crossfire board combo, 8gb mem kit, hd-6770, Silverstone
Strider Essential 500W Power Supply

Best answer selected by mshave.