Id say the image dyanamics, jbl good amps, jl good subs and amps or infinity good subs. Below that i would rate mtx for amps and high end subs, and clarion for there headunits. Everything else is pretty much shit At the bottom of that list should be audiobahn, volfenhag and lanzar there just horrible for quality and sound the lanzar might be the better of the three. Everything else falls somewhere in between. But thats why car audio is 75% opinion. So before i get a bunch of replies about how audiobahn is better than this(which it isnt) and mtx is better than that i want to clarify ITS A FUCKING OPINION.