Wellmy friend has an S2000 and he wants a system in it. He really just wants his highs/mids louder and definitely clear and some better bass. From first glance it seems like he has some 5.25s in the doors with tweeters so I told him we could replace those with a decent set of components and then just add an 8" sub or something for some bass since he has limited room. Now what are some suggestions? Any help would be appreciated, especially with the sub setup. Thanks alot.