Are you gaming only or more work orientate pc? If your build is mainly gaming, no need to get 16gb ram right now.
Get a more popular brand psu. PSU is very important if you do not know, corsair are good one,xfx,thermaltake, if you are not planning on going crossfire, 600W is more than enough.
Are you overclocking? If yes you need an after market cooler. If not there is no reason to buy the k version.
Are you thinking about buying more storage or is that ssd have a huge storage? Installing os and using it for a couple of days/weeks and you'll ran out of storage very quickly under 120gb+ or 240gb+ ssd.