imo I don't think you should go bazooka, I really don't like the sound from them, I find it's a very hollow thud sound no real pounding sound. In a small car like that I'd suggest a 8" solo baric L5, an L7 will sound better but they cost quite a bit more. I bought a 12" solo baric L5 in a ported box on ebay for only $200, that's the price of just the box in a store. Sounded great for years and still sounded great when the car was sold. I'd also suggest kicker, alpine or jl audio for speakers but almost just as importantly as the brand name is the type of speaker, coaxial or component. Go with component with a set of crossovers and you'll have amazing sound. I'd also suggest getting rid of that sony head unit and getting a jvc. As for amps, go more for quality then size, especially if you put a 8" subwoofer you don't need anything big just good quality. In my car I have 2 10" alpine type r subs that run 500watts rms 1500watts peak, I only have 2 450watt amps powering them and they sound great.