budget subwoofer

I just picked up a Stinger Audio MT-700.1 (500x1@2 ohms, 700x1@1 ohm). I also have a Fox Acoustics 12" enclosure for a 2016 Ram Quad Cab. It is sealed with 1 cubic foot of airspace. Initially I was looking at a 12" Sundown SML as it seems like it would fit the box perfectly and is right within...