New Build Checkup

As has been suggested, there are better PSUs (the suggested models are fine :)). I'd also look at adding an SSD for your boot device, as it makes everything so responsive - the Crucial MX100 is a good option (and I think has dropped a little in price since the MX200 was released), and I seem to remember the SanDisk X300 being quite good and comparatively inexpensive too.