Corsair or Seasonic around 650W, regardless of your budet (if you can't buy any of them now, save money and do it later).
Budget needed for case suggestion.
thanks for the reply. I've changed the system a bit.
processor to core i5 750 , motherboard to gigabyte p55-us3l and ram to kingston ddr3 4 gb 1333 mhz (2*2) but the case is still undecided.
My budget for the case is around 100$
and is there a chance that 400w to be enough for the system?