First of all, what in the hell do you do for a living?
Second of all, I cannot verify what you said about it not accepting anything faster than DDR400, but I know that if you are planning on putting 4 gigs in it do not expect to overclock very much, if at all. Not that you should need to anyway with a system like that
I can't remember if nForce4 will use DDR2 or not. Better answer that question first.
If it doesn't, and uses regular old DDR, I would suggest this:
http://www.newegg.com/app/ViewProduc...146-969&depa=1
If it does require DDR2, Crucial Ballistix is nice. Otherwise, it's hard to go wrong with OCZ or Corsair.
Good luck, and have fun with that system!
Odie
