6 cores is an overkill for the gaming PC. it will just draw more power and give more heat.
what games you intend to play, what will be your general usage and what other components/stuff you already have (like UPS, keyboard etc) so that we can refine more.
i3-530 - 5.7k
CM Hyper 212 CPU cooler and CM Freeze Thermal compound - 2k
Gigabyte GA-P55-USB3 - 8.2k
NZXT Gamma - 2.3k
Corsair VX550 - 5k
G.Skill Ripjaws 2X2GB kit DDR3 1333Mhz - 7.5k
Sapphire HD5850 1GB GDDR5 - 16k
WDC Caviar Black 500GB - 3.2k
APC UPS - 3.3k
10k remaining balance it between Display, mouse and keyboard.

as they are highly based on personal preferences.
if you don't want a HD5850,
get the HD5770 - 9.7k
Cooler Master CM690 II Plus Case - 5k
DELL 21.5" ST2210 Full HD (HDMI, DVI-D) - 9.3k
and spend the 4.5k on keyboard and mouse.
or an Core i5-750 Quadcore CPU - 10k
and sorry I'm not familiar with AMD proccy, mobos
_