600-700 Gaming computer (already have gpu)

APPROXIMATE PURCHASE DATE: Within two weeks

BUDGET RANGE: 600-700 before Rebates /w delivery charges

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: gaming, running multiple programs (watching multiple videos, word, excel, etc), surfing the internet, watching movies

PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS

PREFERRED WEBSITE(S) FOR PARTS: Recommend me please (newegg.ca, ncix.com, canadacomputers.com)

COUNTRY OF ORIGIN: Canada

PARTS PREFERENCES: Don't have one as long as they run and reliable

OVERCLOCKING: No

SLI OR CROSSFIRE: Huh?

MONITOR RESOLUTION: 1440x900

ADDITIONAL COMMENTS: Quiet computer is nice but willing to sacrifice for a better performing/non-overheating one. Since I have a GPU already, I hope that the system will have upgrade space/compatibility for other graphics cards.

Also someone already recommended me a system before but the link was dead ... didn't act quickly enough sorry!  

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

This was atticu5's suggestion, but I can't get hold of the other one.

CPU: Intel Core i3 530 (Dual-Core) (I got no preference of brand)

GPU:
I already got one from a friend, original ATI 4850 (But hopefully for future reference someone can recommend me something, needless to say the system should be compatible with the 4850)

RAM: Kingston ValueRAM 2x2GB DDR3-

HDD: Samsung 1GB SATA 3.0GB/s

Motherboard: Gigabyte GA-P55M-UD2

DVD: ASUS DRW-24B1ST/BLK/B/AS DVD-RW

Case: COOLER MASTER Centurion 534

PWR: SILVERSTONE ST50F-ES 500W




Thanks a bunch guys! I got a great answer last time hopefully theres a follow up~