2013 FRS AUDIO, ANDROID OPTIONS

[SR5]

So I got the car not too long ago and I still have this HU above. Stock 2013 FRS system is quite disappointing. The start-up cycle with stock exhaust is louder than this system can ever get.

I've considering the following upgrades but each has a dilemma:

Ca-Fi Head Unit: Line output is weak.

Satellite (XM): Stock 2013 wiring & antenna does not support it.

Backup Cam: Not supported on some HU's, Rydeen & knockoffs are hit or miss.

OEM Audio: DSP self mic tuning, mids, & lightweight 10"-to-12" sub can be had for less?

Custom Sub box: MDF & fiberglass stinks and soaks up other odors.

Dynamat, roadkill, overkill, spray etc: Lightweight materials are now available and don't smell. Materials such as VB-2 are ordorless and lightweight.

I don't feel like going down the same road with car smelling like roofing material, mdf adhesive, 2/4 gauge wires & rca everywhere. So I may look into options that are plug & play and lightweight.

For Android users that had stock 2013 scion head units, what are some of the plug & play options?