I kinda like the deeper bass of a 12. I had two 10's but too loud in my opinion with only 240 watts to the pair. I im going with 1 10 and only 120 watts and blends much better with the front stage. Depends how loud you want it to be and if you into loudness or sound quality. I saw a tl with 4 10s at a stereo shop with a false floor and still pretty good trunk space. Remember if you take up the spare tire you have nothing to save you from a flat. Thats why i haven't. I have a 4 hour trip to school and don't want to get a flat where there is no cell phone coverage.