One thing I have learned in lots of builds - a good power supply is worth every cent. Cheesy power supplies can cause all sorts of instability, and rock solid systems have good power supply.
Secondly, power supplies last a long time and in my case move from system to system. So i spend the money on that component.http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010
I would be looking at something like that.