OK so recently I had thought of adding a aftermarket sub to my FA5, most likely something in the lines of a Alpine Type R. However, the only down fall is that this will add more weight to the vehicle which in the long run will slow her down a little. My question is that all you guys that add sub(s), do you see a difference in any performance from adding it? On average, how much does a sub, box, and amp add to the car. I love my clean rich bass but am just debating if its worth it. Just want to know what all you guys think.