For our money, True Detective, The Bridge, Ravenous, 300: Rise of an Empire, Picnic at Hanging Rock, and Wolf Creek 2 are the Must Own titles. Then again, you could make a good argument for owning any of the titles on this list. Well, most of them, anyway.
DVD wise, Crystal Lake Memories, Goodnight Lane, Haunt, and Hide and Seek are well worth your time and money.
July is going to be even bigger on the Must Own release front, so get what you need of these June titles now... because when you spread your purchases out a bit, it makes it easier on the wallet.