EA380 or Neo 400 would be fine for those specs , Neo 520 or EA500 if you think you might upgrade the card to something that requires 2x 6 pin connectors
http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100006519%2050001516%2040000058&IsNodeId=1&bop=And&ActiveSearchResult=True&CompareItemList=58%7C17-371-029%5E17-371-029-TS%2C17-371-033%5E17-371-033-TS%2C17-371-035%5E17-371-035-TS%2C17-371-030%5E17-371-030-TS