The main thing is that i need a power supply, but I'm not sure what to get. I would like to keep it as cheap as possible, but i realize that I don't want something too cheap or it will be unreliable. I'm also not sure if I should get the 5770, or a card that doesn't do dx11, but is more powerful. If I were to get a different card, what would be recommended for around the same price? Last but not least, I've heard that getting a Caviar Black would be better instead of the Green, because the Green is only a 5400 rpm drive. Is this true, and how much faster would the Black be.
Thanks in advance for your help. Also, if anyone has other opinions about this build, let me know, because i'm open to changing things around. The only parts i've bought so far are the case and dvd drive.
I'd recommend a DX11 card. Only that its to help 'future proof' your PC. I've always liked Nvidia, and i'm personally holding out for their dx11 cards, but the 5770 isn't a bad choice considering the cpu your getting.
If you want top performance, go w/ the black. It has higher transfer speeds because its got a faster spindle speed.
I personally wouldn't go for a GS series BFG psu. They are BFG's lower end PSUs and while I'm not saying they are horrible, you do have a few alternatives. They do have a solid LS line of PSUs but they are probably sold out/hard to get at this point.
There are plenty of awesome PSU suppliers: Corsair, PC power & cooling, enermax, antec, etc. But other than OCZ, antec has some great prices.