I realize this thread is a few months old, but in case anyone out there is still wondering about MIA Thrifty's intermediate offering, it is indeed a Ford Fusion 95% of the time. I travel to MIA every week, and the Fusion is the reason I rent with Thrifty. It is an excellent automobile, and miles ahead of the intermediate offerings from other rental agencies, especially those with primarily GM fleets. Most of the MIA fleet is very new, as well, so I almost always get a car with Sirius still active.