WHERE DID U PUT UR AFTERMARKET STEREO & SPEAKERS

Unless you have people in the back a fair amount of the time, all you need is good speakers up front small sub in the back with decent quality wattage, new amps are fairly cheap now day or buy a used Rockford Fosgate 2 channel 150-200w @ 4ohms x 2 or 4 channel 100-150w @ 4ohms x 4 more than enough for two fronts and a sealed 10" sub. And if worried about volume and bass, gains can be ran fairly low.