Buddy antec TPQ gives 1700w power on full load. Its that good and is 80+ silver certified. It handled 4 gtx 480's in a 4way sli easily ,so two 580's are very easy for it. Check the above video review. 1500w psu's are very rare and will be an overkill for this system.
Check antec psu calculator and you will know.
Since op's going for corsair ssd, wd black is not required and will be a waste. Blue will be more than sufficient. The primary partition will remain in the ssd.
Noctua is more than enough for cooling the i7 2600k.
8gigs of ram will be more future proof. Since ram prices are very low now, its better to add them now.Games will start using more than 4 gigs of ram after crysis 2 which supports 8 processing threads.