CAR HIFI HELP Advice urgently needed!!

Hi guys, I need , as written above , the help of people with a clue. I have a Space Star GDI (BJ 1999) and want to install myself an audio system. Since I am an absolute audio loan I wanted to ask you what I need for it all. I mainly listen to rock and electric and want a good system that delivers rich sound and good bass. My budget is so about 300 € to 400 €. With all the wussel of offers I already feel dizzy … ride n 2 way system oedr b do I smoke n 4 ways or n 2.1 or how?? I have unfortunately really little rope with the hardware … (of which I would still be able to wire xD) Is there also something good (for my purposes) as a set? How much power do I need to get a good sound / volume / bass ratio. (I hear moderate volumes and want to blast my eardrums ned ^^) Thank you for your tips Lg Daniel