Instead of the 8320 I'd go with the fx 6300 ($120) and use the saved money to buy a better gpu, such as the radeon 7950. Or go up to a 8350 and buy a 7850 instead, and replace it later.
Get a 7950 much better deal . I think newegg had a his for 179 U.S. Thats a killer deal . Jump on it . http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007709%20600100181%20600286767%20600286739&IsNodeId=1&bop=And&Order=PRICE&PageSize=20
The PSU is fine for wattage. You would only need to upgrade if you planned on crossfiring your gpu. If that's the case, you should increase your psu to 650w for the extra headroom.