By the looks of it all will fit, except the 2GB, i would switch to 4GB if i was you. It's a bit more expensive but so much difference in performance.
Do not forget to check your Power Supply Unit, as that configuration will consume considerably more power then your old one. A good A-branded 600W PSU will do nicely, preferably something in the lines of Corsair or Zalman.
OK thanks a lot to all of you, i will buy those parts and a new power supply!