i7-2500K is all you need, not the 2600K plus that will save you about $100. But if you really want the 2600K, then disable hyper-threading in bios. Both corsair & Intel 120GB SSD's are awesome, i went with Intel. Far as ram goes you only need 4GB of ram. Corsair dominator is greatness, just lower it to 4GB unless you want extra as backup. Far as PSU goes, corsair HX750 modular would be perfect in your build. You should also consider getting a 1TB samsung Spinpoint F3 to go along with that ssd.
MB - Asus pro
CPU - i7-2500K/2600K if you prefer
GPU - GTX 580( I would get the directcu 2 asus version)
PSU - Corsair HX750W
HDD - Samsung spin-point F3
SSD - Corsair or Intel 120GB
RAM - Corsair dominator 4GB CL8 8-8-8-24 1600
CPU COOLER - Noctua NH-D14
CASE - Antec 900(I would prefer NZXT Phantom or Corsair 800D)
You could also consider getting noctua fans for the case, there some of the best you can get, or get what you prefer with money left over. Those are all my suggestions along with your suggestions.