Wow. DO NOT get a new psu. Your current one is overkill already. I ran a similar system off of a 420w aspire psu ($10-$20) that came with a case for 1 year. People way overestimate how much power you need.
Crappy psu's have very few amps, and cant output what theyre rated at.
Quality psu's, such as Antecs, not only can put out the amount of power they say, but have a good amount of amps and can run over 75% without crapping out.
In fact, im pretty sure theyre underated, and can output more.
[01:49] ricanflow: neohe/neopower is the same thing, but modular and painted gunmetal gray and sleeved
[01:50] ricanflow: and thats what im running in my main