IF you plan to have max out FPS in doom3 and HL2 I strongly urge you to get a FX-53 939pin. It is expensive, as most people here will agree with me. You get what you pay for though, I would die for a AMD64 939 system, but Im broke =(.
I see you have a VALUERAM on your list. For 226 dollar you can get something better, like a corsair xms, crucial ballstix or mushkin.