get 2 x 4gb ram. it is enough for gaming.
for hdd, if you are able to get black for less than 5k then go for it as it offers 5 years of warranty compared to 2 years of blue/green drives.
ok got it
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Guys finally bought the pc specs are little different:
core i5 4460
gigabyte h87m-d3h
crosair vengence (1x8)gb ram 1600mhz
segate barracuda 1tb
asus dvd writer
antec vp550p v2
coolermaster k281
logitec mk200 kb + mouse combo