I was hoping someone could help me decide on a single 12" for my 2012 Ford Focus Hatchback. I've already purchased my front sound stage which consists of Morel Hybrids 6 1/2 components and now looking for suggestions on a really good SQ sub. So far I've heard that HAT and Image Dynamics would be a great option but was wondering what others would suggest. My decision on a single 12" is solely to retain as much hatch space as possible. Thanks in advance...