I drive a Preve too, my upgrade:
HU - Pioneer AVH-Z5050BT, supports Android Auto and Apple CarPlay, can setup steering wheel control without bracket (but cannot set multiple function like stock. For example you can only choose to set the Phone/Mute button to either Phone or Mute function but not both); however, on my car the 'Mode' button seems like interfering with 'Next' button so I have to give up assigning function to 'Mode' button. Since this is an older model released back in 2017 the price has come down to below RM1.5k

Front - Adams Digital EMC-650 Mid Bass Speaker + Adams Digital RUT-28 Tweeter

Rear - Stock Blaupunkt speaker

Sub - Pioneer TS-WX110A underseat Active Subwoofer

No external Amp installed.

This post has been edited by TitaniumZ: Nov 13 2019, 08:01 AM