Getting an Intel Core 2 Duo E6400 and a 7900GT would help u towards that goal. The rest can be left upto ur personal choice.
Check out the config I posted in this thread too. Except the processor and maybe the video card, everything else seems to fit in nicely. And the price in it is in CAD, which leaves u a lot more room for choosing better RAM, video card(s), PSU, processor etc.