You should use low profile RAM, to avoid any clash with cooler. If you like GSkill, their Ares range is good. You don't NEED 650W. A good quality 550W is more than enough. Stick with 650W, IF it gives you best deal. Personally, would prefer Samsung 830, or Crucial M4, for SSD. Fan choice fine, doubt you actually NEED them. Subject to above, good to go.