2 Gigabytes needed indeed for games like F.E.A.R,Battlefield 2 etcetc and future games.

And take a heavvier supply i would go for this Enermax EG565P 535 Watt Power Supply (SLI-Ready) or abit heavvier even ...

Very nice setup!but wouldnt you go for a Intel Conroe E6600 CPU? Or a AMD Dual core X3800+ or higher ( better for gaming than p4 D)

Just my opinion