Audio System

I want to get a sub and an amp in my car. I don't want anything that's too loud. I want something that you can feel in the car, and at the same time not having rattling the trunk. I'm looking into an Infinity base that would cost around $80 and a box that would be $40(I thought wooden boxes were cheap..oh and also an amp at the price of $120, and a wiring kit for $20..oh and also installation fee of $60(I'm a noob at these things, so I'll let the professionals at Fry's handle it).