for the honda deck of choice (with highpass) and hertz energy speakers all the way around possible amp like a p400-4 if it can be fit somewhere. shop pack of damp pro around the whole vehicle with plenty behind the speakers as well as speaker tweekers. LLP on the floor if the current noise floor is sorta crazy but that would be optional
for ken it depends on how crazy he wants to get, that lexus probably wouldn't be too fun as far as replacing the speakers BUT its not improbable. If its just bass id say DD 3500 12 and T1000-1bdcp. if everything then add a 360.2 T600-4, hertz hi energy 165XL and alot of fun. shop pak + bulk pack of damp pro, rattle pad or overkill on the rear hatch, optional speaker tweakers