i7 or lower but no i3
also phentom x4 will be good of course unlocakble for overcloking
ddr3 4GB in two items
or two 2GB ram's ddr2
(faster by design are ddr3)
best companies so far for ram are : kingston,goodram,hynix
for power source OCZ or Corssair ewentually Seasonic(bronze,silver,gold series)
everything else will be junk no chiftec
all atleast 500 or 600 watt to 850
and even 1200watt
HDD or SSD
SSD can be faster but not live long so buy both
SSD for OS and games loading ,HDD for your precious data
(HDD will be slow for games ,SSD can loose your data)
samsung was sold long time ago so not buy anything of them they was loose quality
no WD green why because green series are "eko" but really extremally slow
WD caviar ok 1TB or more eventually for less expensive 500GB but other series
you can also try barracuda or toshiba but im dont trust them
their HDD in past was have very bad quality and often was damaged by production
SSD of course Kingston and Corssair
no matter what you choose you need good motherboard
http://www.overclock.net/t/1354973/list-of-motherboards-by-overclocking-options
then you need a good cooler
no matter what you choose as socket so far best is zalman ,scythe,arctic
and good choice will be silver thermal paste than junky silicon thermal paste
a Pc box hmm
nothing from modecom
a good Pc box :
be quaiet,silentium,fractal design
corssair should also have good one
video card :
gtx 680,gtx 750 ti
or
Radeon HD 5850, HD 5750
of course you will need change all game settings
and last one keybord,mouse,monitor
lcd monitors : nec,benq,hp 17 inches
and you can also try 20 inches
keybord and mose :
low end : active jet (usb optic mouse),genius
highend razor (everyone recomend it but i never tested you can try)
for mouse important are dpi more dpi faster reaction "office mouse" have 800 dpi
for gamers at least mouse must have 3200 dpi
better are laser mouse but i never see that type popular is optic
thats all .
if you need do greates machine find ranking in web