I'm going to be building a very similar system as the one john3 suggested.
You will need a dual core processor if you want to use the new physics card when it comes out. I was also going to get the 3700, But now the 3800 x2 is on my list
I was thinking about getting the G.SKILL Extreme Series 2GB DDR 500 (PC 4000) ram $192 with instant savings of $35 = $157.
What would be a better choice, G.SKILL Extreme Series or Corsair XMS?
The Saitek Eclipse was on my list until I found out it doesn't have play, stop, pause, track skip etc...
So if you need those buttons/keys look at a different key board.
All in all, that will be a nice build