im not sure how much u want to oc and what kind of budget u have but

cheap- http://www.newegg.com/Product/Produc...82E16813157281
less cheap - http://www.newegg.com/Product/Produc...82E16813128509
bank - http://www.newegg.com/Product/Produc...82E16813131788

they are all good but depending on how much u want to spend