Factory left front speaker fried. Was debating just replacing it but may upgrade. I have a really nice home system, but do not know much about car audio. I'm not into the house shaking car systems I hear drive by - I just want good, clean, rich, sound that I can crank a little bit. Do you think that a sub and amp make the huge difference, or would a new, quality head unit with two good front speakers suffice... front what I've read here, rear speakers are pretty much optional. I know that many will say - "it's whatever your taste is." My budget will probably be 400-500 max. I just want nice sound that doesn't cause my wife to kill me (I spent a lot on my home system last year hahahahaha). Lastly - are kick panels the way to go with a pickup truck?