Originally Posted by Callisto

Sorry to read this. I know with me a full sound experience if it be music or movies is part of my enjoyment.

I would think that if I were to recommend the best upgrade that would drastically increase the full music experience with a factory sound system would be add sound deadening material to all the door cavities, rear hatch or trunk. There are area's but it get a little more less DIY friendly and if having it done costly.