Mushkin is great for memory, I'm using that right now.
No experience with Cooler Master power supplies, a good PS is something you can keep a looong time, and contributes significantly to cost of operating the computer and how much heat it generates. The Seasonic-X series are expensive but are worth it IMO, getting over 90% efficiency:
http://www.silentpcreview.com/Seasonic_X650
I have a Seasonic and a Corsair PS.