Hello, since you're OCing you probably want a good to decent ventilated case. CM is a great budget case brand and to me it's quite stylish I love the looks. I'm doing a i5 not overclocking though but my rosewill destroyer is coming with x2 120m case fans, and 1 LED front fan. It's ventilated pretty good and very cheap around $60. Since you didn't give a budget and there's a vote up there I'm going to presume you can afford it so I'd go with the CM haf 932.
P.S. rosewill destroyer is a midtower