I used to have an Infinity BassLink in the back of my old Blazer. 10", powered, easy to install, and worked pretty well. Wasn't super loud bumping thumping, but it matched the rest of the stereo loudness perfectly so it was great.
As a plus, it installs with screws, and when my truck got broken into the bad guys were unable to take it because I put the screws in facing the walls of the truck with a shorty screw driver. They apparently were unable to get them out. I also reinforced them with fender washers so they could not rip it off the floor. I'm going to do that again with my next truck.