I have the mid line system (7.0") in my JT and I think the sound quality is horrible, especially at higher volumes. It also lacks power especially with the doors and top off. I dont need more cameras, video games, Nav, HVAC, etc. I just want to improve the sound quality and add more volume (with good quality) to what I have. Are there options for replacement speakers, a sub and perhaps an amp t drive it all without replaceing alot of the factry stuff and adding a bunch of stuff I dont need or want?