I am trying to decide what size and brand subs to have installed in my car. It will be going behind the rear seats in a 911 and there isn't a lot of room. I think either two 8's maybe two 10's or 1 12" will fit. What would be best for SQ? I am using a mcintosh MCC446 to power the whole system. Pretty sure I am going with MB Quart QSD's for my mids and highs. Would they be a good choice for SQ or should I go with something else?