Looks awesome. Newegg will give you 8GB free RAM with that mobo, so drop the Ares.
One of these will be fine: http://pcpartpicker.com/part/antec-power-supply-ea650green
You might want to get a different case; IIRC that one is very quiet but doesn't cool very well. Your choice though, and your current one is fine, it just might limit how far you can OC.