Yes, those two crucial sticks will work in dual channel (I know a guy who actually has that same set..), They seem really good. But if you want to run BF2 on high smoothely, you are going to need to save up and get 2x1gb.. I would get this: http://www.newegg.com/Product/Produc...82E16820227210
As for the power supply, I don't think it will suffice at all. Like at the amps on the 12v rails.. 10A and 15A? I don't think your system will take that too well..
Heres the one i have for my system: http://www.newegg.com/Product/Produc...82E16817103464
Stable as a rock, but if you intend to do SLI down the road I don't know how well that will turn out..
As for the eVGA motherboard, I don't know eVGA for thier motherboards, just thier video cards, So i can't really comment on that.