From my first vehicle I have swapped sound systems out.
17-19yrs old. First vehicle I had used alpine door speakers and 2 8" Kicker substations with kenwood amp.
19-21yrs old. Second vehicle kenwood headinit and 5 channel amp with kicker components and Comp VR 10"s
21-24yrs old. Third vehicle kenwood head unit, 3 JL amps, MB Quart components and 10" Subs
24-28yrs old. Forth vehicle kenwood headunit factory door speakers and a 8" bazooka tube
28-29present years old. Fifth vehicle. Factory Sony system. It's clear and sounds great. The sub bumps not to bad(added polyfil). My only complaint is that the highs aren't high enough for my liking.
Basically what I'm saying is that after having loud systems my entire life, getting older has made me enjoy the clarity of the Sony system(other than highs not loud enough). I dont plan to do anything to it unless there is a easy fix to getting highs louder. Does this make since?