Well depending on what you mean by good. When you say good im thinking.
2 sets of component speakers . With integraded x-over
New 6x9
4 chanel amp for the components
2 chanel amp for the 6x9
2 12inch subs in ah sealed box.
2 amps. 1 per sub .
And ah new head unit with individual controls to adjust the amps right from the head unit..
Personally.. I would use kenwood head unit and mtx speakers and street wire cable only..