Rate My Build

I've been wanting to upgrade for a while and wanted to see what you guys thought of this build before moving forward. I have a full sized case, not sure the brand, and it's 5-6 years old.

Current PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Current GPU (GTS 250 - Will be replaced soon):
http://www.aztekcomputers.com/25SGF6HX1RUV-GALAXY-TECHN...

Possible Mobo:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Possible Memory (To Start):
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Possible CPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Possible CPU Heat Sink:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


Anything I should get instead of in the same price range? Anything I'm missing?