I want to move up to a am3 system I"m not doing a complete build I'm just upgrading mobo,cpu, ram, psu, and gpu. Im just looking for your opinions but id have to stay in price range of what all these come out to. I didn't put a graphics card I"m lost as to what to go for but I am looking at the HIS 5770. Lastly I chose a psu because I have a 400w one right now and I dont think it be enough for this new system you guys agree?

ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard

AMD Phenom II X2 545 Callisto

Combo deal 4gb corsair ram and coolmaster 500w