Do you only want normal hd's, or are you wanting to go ssd as well? For a standard hd, either Samsung F3 1TB, or Seagate 7200.12 1TB
You're looking at upgrading.. FROM A 2GB 5970?
err.. what're you using all that power on?
btw, the second 5970 won't scale very well if you meant crossfiring when you said upgrading ( you won't get much out of the 5970)
Someone else can enlighten you on a good psu, since I'm not too good when it comes to 1000W..