The above are good sugestions on looks... now for the car to sound better. Since you are on a budget try this. For now keep the factory head unit, and shop around for good replacement speakers, and a good 4 channel amp with good power to bang! Save up some $$$ and add a sub and an amp to drive it... Bingo!!! Hear are some cool products to look at... Orion amps, Canton Speakers, Or All Alpine Amps & Spks or look at Phoenix Gold or MB quarts... All of these are a solid foundation to build on... Good Luck!