To power my most recent computer, I decided to go along with the Corsair CXM 750 watt power supply. It is a modular power supply, which keeps the cables to a minimum in the case to help with air flow and in general just a cleaner look. It is also Haswell Ready, I was going to get a lower watt power supply in the same series, but they were not “Haswell Ready” and the reviews did show some issues with the computer not coming back from sleep correctly.
Other then that, not much more to review about it, it just works, modular design, quite operation, and Haswell Ready.