tbh i wouldn't bother mate i plan to have a relativly ok system i have a pioneer head unit,cd changer and amp and sub goin in mine prob a few speakers too, you don't need anymore than that imo, but others would disagree i like somthing that sounds good but not ott and lose all your space, plus you'd be without your car and be forced to go places......
i'd rather just fit my own system and do wot i wanted.....
just my opinion...